Answer:
A. Singular verb
Step-by-step explanation:
"Everyone," "everything" and "everybody" are indefinite pronouns that refer to one group of objects, beings, places, ideas or persons that are not specified. These words, as well as "everywhere", are in the third person singular and therefore should always be used with singular verbs. Here are some sentences using those pronouns:
Everybody agrees with my views.
Everything is coming together so well.
Everybody in the room has been so quiet.