ECONOMIC If the Federal Reserve increases the reserve requirement, banks are required
to:
A. hire more workers to reduce unemployment.
B. charge a higher rate of interest on new loans.
C. keep more money on hand instead of lending it.
D. increase their investment in Treasury securities.

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."

the vibration from the sound waves messed with the glass and it shattered.

hope this .

answer; /// the above statement is (true);

answerthe above statement is (false);