Which answer choice is a complete sentence?
a. because of the loud music.
b. we played for hours.
c. in the wildflower field.
d. on the side of the road

"We played for hours" is a complete sentence.

B

Explanation

It is a sentence because it has at least one subject clause and a predicate.

In the above sentence, the subject is we and the predicate is played.  

A subject is anything in the sentences such as a person or object doing the action.

The predicate describes the subject's actions.

This is a basic sentence and the requirement is that it should have subject and predicate.

In addition, a complete sentence has a clear meaning that doesn't leave the reader having any lingering questions regarding the conveyed message.

the answer is b. an opposing veiwpoint

explanation:

trust me 100%

the answer is irony!