15 características de los gobiernos autoritarios en guatemala con su nombre de presidente. Ayuda​

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; delirium is a common adverse reaction seen when elderly patients take diphenhydramine;

answer; /// you data to develop general ideas or theories;