Looking up from his computer monitor, Jason mopped his brow, exhaled sharply, and picked up his phone. Complete predicate: mopped his brow, exhaled sharply, and picked up his phone.
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.