Answer:
The option used to revise this sentence was C. changed to a question, exclamation, or command.
Step-by-step explanation:
The original sentence, "You should stand up for your rights," is conveying a suggestion. By using "should", the speaker is presenting his opinion, but not in an imperative manner. It's as if he said, "It would be good if you did this. But, whether you do it or not, it is your decision."
The revised sentence, "Stand up for your rights!", is in the imperative mood, meaning it conveys a command, an order. Unlike the original sentence, this one eliminates the suggestion of a course of action. Instead, it urges the listener to do it, to obey. A sentence in the imperative mood does not need to present a subject– it is inferred that it is the second person. It commonly begins directly with the base form of the verb; the exclamation mark is an indicative of urgency.