[The same passage from Q.41 applies here]
Select the most appropriate synonym of the word marathon stated in para 6 of the given passage.

A marathon is a long-distance running race, and by extension, denotes any event or activity that takes a long time and requires endurance.
Therefore, Extended (long-lasting or stretched out) is the most suitable synonym.

Ephemeral, Momentary, and Fleeting all describe things that last for a very short period of time.