Answer: A) Looking up from his computer monitor, —— mopped his brow, exhaled sharply, and picked up his phone.
Explanation: The predicate is the part of a sentence that contains the verb (or verbs) and that says something about the subject (what the subject does, have or is). In the given sentence the subject is "Jason" and the complete predicate is "Looking up from his computer monitor, —— mopped his brow, exhaled sharply, and picked up his phone" because it is stating what Jason is doing.