Devina is a freelance photographer. she always carries a portfolio with her whenever looking for a job. what do you think is the most important thing in her portfolio?

E. sample photographs

Explanation:

The portfolio is the means by which Devina will showcase her work, her style and her skill. It is a show of your work and a proof of your qualifications. If she is photographed her job is to take and edit photos, then the most important thing about her portfolio is a sample of good quality photographs with impeccable editing. These are pictures that Devina will take to a possible client to show that it is in this area that she acts and that is what she is good at.

what are the phrases to choose from?

you stated "which of the following" but i don't see anything else