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".
Answer:
Algunas personas no estarán felices si morimos porque algunas personas se preocupan por nosotros Explanation:
1) b
2) a
3) c
4) d
5) b
I hope it helped