Answer:
A. Changed to a question, exclamation, or command.
Step-by-step explanation:
Exclamation marks are used to indicate shock or surprise. They help the reader realize that he/she should add emphasis to a sentence.
The idea is not to use them in excess so they can have a stronger impact. In other words, the less their are implemented the more powerful they are. The recommendation is not using more than one in the same text.