What words accompany nouns or pronouns for the purpose of modifying other nouns, pronouns, or verbs?

________is an element of credibility that deals with a speaker's energy and is often projected through delivery

Fill in the blanks with correct word

A well-known actor who loves dolphins was asked to give a speech at a fundraiser for an aquarium. His testimony is an example of ________ testimony

a. personal b. lay c. prestige d. expert