C. Program
Because camp is an adjective saying what kind of program the kids are in.
Answer:B
Explanation: A linking verb connects a subject to a verb and also describes the action that is done by the subject. The linking verb cannot express an action on its own. It needs the subject of the sentence to express an action.
An example of a linking verb is "be" which is the most commonly used. The purpose of "be" is to indicate the state of the action subject in a sentence.
I would say that it hasn't increased 20% because 1. if the starting percentage was 18%, you would see a larger precentage but that isn't the case.
Sorry, there's no passage to read from.