Explanation
Correct answer: A.
Choice A is the best answer. The convention being tested is the use of verbs to express tense in a sentence. In this choice, the present tense verb “get” is consistent with the other present tense verbs (“are,” “travel,” and “pack”) used to describe the Sherpas and their activities.
Why the other choices are wrong
Choice B
Choice B is incorrect. The past perfect verb “had gotten” isn’t consistent with the other present tense verbs used to describe the Sherpas and their activities.
Choice C
Choice C is incorrect. The past tense verb “got” isn’t consistent with the other present tense verbs used to describe the Sherpas and their activities.
Choice D
Choice D is incorrect. The past progressive verb “were getting” isn’t consistent with the other present tense verbs used to describe the Sherpas and their activities.