Which of these is most associated with an authoritarian government? A. The legislative process is slow
B. Freedom of expression is valued
C. Leaders have absolute power
D. Elections are conducted fairly

C: Leaders have absolute power

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."