According to Lazarus, hassles are situations which: a. promote avoidance-avoidance conflict
b. represent the turning point in ones life
c. are frustrating events faced in daily life
d. result from conditioned emotional responses

when the united states took over

i truly dont know the answer wait i do its 1,3,4

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."