Answer: B. communicate
Explanation: Scientists hope that after experimenting, other scientists look at their data and <u>communicate</u> with one another.
I would say tense and uncomfortable because "it was undoubtedly hot" "he began to sweat" "began to throb in his ears" the sweat and heat makes it very uncomfortable also, the rumbling and throbbing sound makes it tense.
hope this helps :D
The Correct choice is <u>a</u><u>dverb</u> <u>phrase</u> .
