Because cost of living varies, it is important to consider when conducting a job search.
A)location
B) tuition
C) independence
D) productivity

A. location

Explanation:

because of the first 5 words "because cost of living varies"

the answer should be the first one. "many people find his lyrics very moving."

it by far makes the most grammatical sense and is very objective, removing any first person from the original sentence and keeping with the sentence fluency.