Answer:
A. mopped his brow, exhaled sharply, and picked up his phone.
Step-by-step explanation:
Predicate in a sentence talks about the actions relating to the subject of the sentence, Here, The complete predicate is option A.mopped his brow, exhaled sharply, and picked up his phone. because they were the actions performed by the subject (John) the subject in a sentence usually refers to the person, place, thing, etc (Noun).