The sentence shows the best indicator that a character is protagonist is C. he is motivated to achieve a goal.
Explanation:
In literature, a <u>protagonist</u> is a main character of a literary work that leads the course of the story through his decisions and experiences. As the main character, the <u>protagonist</u> is motivated to achieve a goal and take action in the story, regardless of the possible conflicts or antagonists he or she may need to deal with.
Suddenly disappear. That conveys the thought that something so dramatic happened to society that the first amendment is gone. That should stir every American into finding out what this sentence is about. The first amendment is the backbone of American Democracy and should not ever be ignored.