It means the operating system used in enterprise.
When a corporation needs 100 computers to have OS, it has to order enterprise OS packages from M$.
Answer:
A. mopped his brow, exhaled sharply, and picked up his phone.
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).
The File Transfer Protocol (FTP) is used to transfer files between two computers over a network and Internet.