What did Adam Smith predict would happen if economic individualism were allowed to operate in a country? a. An invisible hand would be required to control selfishness.
b. The country would experience a growth in economic activity.
c. The government would lose revenue because of a decline in taxes.
d. This self-interest would benefit individuals but not the society as a whole.

d or a

Explanation:

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."