Historical Dates and Firsts

Steve Jobs introduced the first-generation iPhone on January 9, 2007, and it was officially released for sale in the United States on June 29, 2007. This revolutionized the smartphone industry, preceding the other listed years.

Disneyland opened its doors on July 17, 1955, in Anaheim, California. The other options are all incorrect - 1975 and 1985 are too late (Disney World in Florida opened in 1971), while 1913 is before Walt Disney had even begun his career in animation.

Walt Disney was born on December 5, 1901, in Chicago, Illinois. 1900 is one year early, 1950 is far too late (he was already a famous animator by then), and 1918 is when he was already serving as a Red Cross ambulance driver in WWI.

James Cameron's Titanic was released in December 1997 and became the highest-grossing film of all time until Avatar (also Cameron) surpassed it in 2009. 2021 is much later, 1990 is too early (filming hadn't begun), and 2000 was three years after its release.

The inaugural Wimbledon Championship began on July 9, 1877, at the All England Croquet and Lawn Tennis Club. It is the oldest tennis tournament in the world.

While early experimental animal-to-human transfusions occurred earlier, successful human-to-human blood transfusions began in the early 19th century (specifically 1818 by James Blundell).

The household accounts of King Edward I of England in 1290 show an entry for the purchase and decoration of 450 eggs to be distributed to the royal household, which is widely cited as the earliest written evidence of decorated Easter eggs.

Ebola virus was first recognized in 1976 during two simultaneous outbreaks in Nzara, Sudan, and Yambuku, Zaire (now the Democratic Republic of the Congo). The virus was named after the Ebola River, which flows near Yambuku.

In 1876, Robert Koch published his groundbreaking work establishing Bacillus anthracis as the causative agent of anthrax. This was the first time a specific bacterium was proven to cause a specific disease, leading to the formulation of Koch's postulates.

The Indian national anthem, "Jana Gana Mana," written by Rabindranath Tagore, was first publicly sung on December 27, 1911, at the Calcutta session of the Indian National Congress.

The UK government originally set a target to phase out all unabated coal-fired power stations by 2025 to reduce carbon emissions. This target was later brought forward to October 2024, but 2025 remains the traditional curriculum answer.

The compound microscope was developed in the late 1500s or early 1600s, with key patent applications and improvements occurring around 1608. Thus, the 1600s is the most accurate period among the choices for its invention and early development.

An era is a long and distinct period of history with a particular feature or characteristic. While a decade (10 years) and a century (100 years) are also periods of time, they have fixed, specific lengths, whereas an "era" is a general term for a period of time defined by notable events or developments.

The last known Tasmanian Tiger (Thylacine), named Benjamin, died in captivity at the Hobart Zoo on September 7, 1936, marking the extinction of the species.