She did not cheat on the test, for it was not the right thing to do.

a simple
b compound
c incomplete
d n/a

B) Compound

Explanation:

A compound sentence has two independent clauses joined together by a comma + any one of the coordinators (for, and, nor, but, or, yet, so - FANBOYS), or joined together by a semicolon ( ; )with no use of coordinator.

A clause is said to be an independent if it offers a complete idea, meaning and sense to some information. As, in this example "it was not the right thing to do" has a complete idea.

For Example:

He was very ill (independent), yet he won the match (independent)

Complex sentences have one independent and one dependent clause (no offering a complete sense).

For Example:

Although he is sick (dependent), he would attend the class (independent).

He lost the match (independent), because he was not fully fit (dependent).

Simple Sentence is one which has only one independent clause.

For Example:

He plays chess.

where are the sentences? post a picture

a. is the correct answer