The person responsible for solving overall technical problems but is also in charge of scheduling, constructing and painting scenery and in general making sure that all designs are executed as conceived by the scene designer is called 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."

answer; scientific;

answer; self-serving bias;