Mahima was boiling water for making tea when she noticed tiny bubbles well before the water began to boil. She wondered what made the bubbles. Which of the following options will explain to Mahima what were these bubbles?

The heat from the gas causes bubbles in the water at heating.

The carbon dioxide due to burning of the gas causes bubbles in the water when heating.

The dissolved oxygen in the water causes bubbles in the water when heating.

The chemicals in the water escaping due to the heat causes bubbles in the water when heating.

The dissolved carbon dioxide in the water causes bubbles in the water at heating.