The correct answer is C. an active verb.
When writing resumes, you should avoid using pronouns as much as you can, especially first person pronouns (I, we). This is because these resumes are supposed to be impersonal, objective, and if you use pronouns, then they are going to be far more subjective than they are supposed to be. Starting your statement with a random noun or adjective won't work either, so you should stick with active verbs to actually show some action in your writing.