The complete predicate in this sentence is A. mopped his brow, exhaled sharply, and picked up his phone.
B and C aren't correct, because they aren't complete predicates - something is missing.
D isn't correct, because <em>looking up from his computer monitor </em>is not a predicate, it is an adverb phrase.
Answer:
Undetermined
Explanation:
Your not giving us context clues from the plot to tell us the actual story.
Answer: Rice was not planted by them.