Question

before cambria entered the arena to watch the speech, she decided to turn her cell phone off. cambrias decision will help her
pay attention to the speaker.
prejudge the speaker.
avoid jumping to conclusions.
research the speakers topic.

Explanation:

Turning off the cell phone removes a potential distraction. Without the phone's interruptions (calls, texts, notifications), Cambria can focus more on the speaker. Prejudging the speaker (forming an opinion before hearing them) isn't related to turning off the phone. Avoiding jumping to conclusions is about critical thinking during the speech, not phone - related. Researching the speaker's topic would require using the phone (if using it for research) or other resources, not turning it off. So, turning off the phone helps with paying attention.

Answer:

pay attention to the speaker.