Bryan finds his girlfriend christina far more attractive as she leaves the darkened movie theater than before they entered. what might account for bryan's reaction?

What accounted for Bryan's reaction is that according to research it suggests that most people they do find enlarged pupils being more attractive.

d. i assume the underlined word is "role." reformat if it isn't.

explanation:

role is closest to part because when replacing words, "playing a vital decision," "playing a vital activity," and "playing a vital dollar" don't make logical sense. the only meaningful choice is "playing a vital part."

this fits one of merriam-webster's definitions of role: "a function or part performed especially in a particular operation or process."