because i have rejected an age at which i am unwilling to depend on my parents,i am out to find a(an) ______ occupation.

Answer 1

If your question is if you should use a or an, you should use "an" occupation
occupation begins with a, a vowel, so you use an instead of a.

Answer 2

Are you sure that statement is correct?

What are your choices?

What is your answer?