Thomas transfers to a new school when his family moves to a new district, and he is placed in a classroom with students who have slightly higher average math grades than he does. Thomas is concerned that he will fall behind. Based on the research, what is the most likely outcome?

Thomas will succeed

Explanation:

Thomas will succeed and make academic gains when he is in the classes with other high achievers.

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."