Ross tends to feel frustrated at work during staff meetings. his supervisor provides an agenda at the start of the meeting and tends to systematically move through the meeting items from beginning to end. ross feels that some of the topics can be skipped and that they do not always need to complete the agenda in order. ross is experiencing

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."

answer; ecological fallacy;