A

C. an active verb.

Explanation:

The main objective of a résumé (or cover letter) is to give a positive impression of the person who wrote it. As such, when writing a résumé, experts frequently advise to avoid using passive voice, as it makes the text more boring and diminishes their personal achievements.

How to Write a Résume Advice.
Advice for Résumé Writing (Source: https://www.bradsbygroup.com)

With these guidelines in mind, it is best to use open statements with an active verb instead of a noun, “I” or “My,” or an adjective. Résumés are intended to be professional and impersonal, and the examples above are either too passive (nouns, adjectives) or too subjective (first-person pronouns).