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".
1. la iglesia católica tiene y tenia un poder muy grande tanto es asi que su influencia era muy tomada en cuenta y sumamente importante
The best answer to this sentence is C. Preferiria because it's only talking about one person, like "yo" means "I'. And the rest of the answer choices are talking about more than one person..
Translated - I "would rather" (means preferiria) travel by road and I would stay in a youth hostel.
So.. yea the answer is C. Preferiria. Glad to help!! :)