Is the underlined word an adverb or a preposition

What sentence correctly uses it’s underlined relative pronoun?

April is studying finance in college. she wants to enter a career that is expected to experience much growth. rank the jobs that april is considering, from the least to greatest expected growth.

“third, all reviewers have a bias – no matter how impartial they try to be, opinions on movies are just that: opinions. this isn’t necessarily a bad thing: if you read a review by a critic that you know prefers foreign films, you know how seriously you should take his scathing critique of ironman.” according to this passage, all reviewers a. prefer foreign films c. have bias b. hated the movie ironman d. refuse to watch popular films