A question mark is the answer
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The abbreviations after the definition in a dictionary are the confirmed parts of speech. Examples:(n. v. adj.) These abbreviations will be consistent in all dictionaries.
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Answer:
because they might not spend a lot of time doing another thing as much as how much time they spend doing what they're good at
The answer is:
A. understand that managing the moon landing while the lunar module had 30 seconds left of fuel required intense concentration.
In the excerpts the narrator mentions the lunar module had 30 seconds left of fuel, so the people who were in charge of the moon landing could not make a mistake, a miscalculation or lose their extraordinary focus. For example, one of the narrators states the men "could not afford to be wrong." Otherwise, the mission could have failed.
Please dont frighten the animal