Which of the following sentences is written in the active voice?
a. the wedding dress was sewn by katie.
b. the red barn was painted by the farmer.
c. the boy jumped on the trampoline.
d. the chocolate cake will be served to the queen.

c. The boy jumped on the trampoline.

Explanation:

In active voice it is possible to identify the performer of the action, that is to say, the subject, at the beginning of the clause. On the other hand, in passive voice there are two possibilities: either the subject is not explicitly visible (example D) or it is the receiver of the action in question (such as in example A and B). In example C, the subject is the boy, and it is located at the beginning.

the answer is something i don't know

c hydrophobia is the answer