Read the sentence below and answer the question that follows.
each economic sector plays a vital role in a nation’s economy.
the word underlined in the sentence above is best defined as
a.
decision
b.
activity
c.
dollar
d.
part

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; a cost benefit analysis;