In this sentence, you are required to pick an action verb. "Interview" is an action verb as it describes a physical activity that the characters are engaging in. On the other hand, the other options are not action verbs, as they do not describe an action that the character is engaging in. Instead, they describe states of being.
The next step to be approached after the paper is written is that an individual should limit their topic and that they should make a purpose of the paper as this is a method that is effective when planning and making an effective essay or topic.