Multiple choice general knowledge science & technology

More than 17,000 flights were cancelled across Europe as the result of :

  1. Error by air traffic control

  2. Strike by labor unions

  3. Volcano eruption in Iceland

  4. none of these

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In April 2010, the Eyjafjallajokull volcano eruption in Iceland caused massive airspace closures across Europe, cancelling over 100,000 flights (not just 17,000, but C is the closest correct cause among options). Options A, B, and D are incorrect causes.