The correct answer is C. Districts are divided to make sure that they favor a candidate from one political party
Step-by-step explanation:
Gerrymandering is an unethical practice used in politics to favor certain candidates or make the participation of minorities irrelevant. This practice involves dividing districts on purpose to favor a result rather than dividing them according to geographical boundaries.
According to this, the statement that is an example of gerrymandering is "Districts are divided to make sure that they favor a candidate from one political party" because in this case boundaries of districts were changed to unfairly help a political party which occurs in gerrymandering.