The answer is "Yo"
this is the answer because "Laura" is saying her opinion.
Not "nosotros"(we) because she is talking about herself.
Not "tu"(you) or "ellas"(they fem.)because it doesn't match up with the verb used in the sentence "creer".
<span>The prophets were the people who claimed to be instructed by God to share His words. They were important because they were the ones responsible to teach the Israelites about God's words. - Don Stewart</span>