سوال ۲ کنکور ارشد علوم کامپیوتر ۱۴۰۱

The sentence asks what quality you would need to finish a marathon — a long, physically demanding race. The right word is endurance: the capacity to keep going under prolonged strain or hardship (stamina). It collocates naturally with sustained physical effort ("the endurance to run/finish a marathon").

Why the distractors fail:

• concern — worry or care about something; unrelated to physical staying power.
• candor — frankness, honesty, being open; a personality trait, not a fitness quality.
• autonomy — independence or self-government; about freedom of action, not lasting through exertion.

Only endurance fits both the meaning and the marathon collocation, so the answer is option (3).

Exam trick: Anchor on the strongest collocation in the sentence — finish a marathon demands stamina/staying power, which is exactly endurance.