17. How were the countries of Eastern Europe similar to each other during the Cold War?
a. Their governments were democratically elected by the people
b. All were part of a military alliance with the United States
c. They were communist nations under the influence of the Soviet Union

d. All made the transition from manufacturing to an agricultural economy

where is the

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."