A traditional economic system progress. A. outlaws B. encourages C. depends on D. discourages Please select the best answer from the choices provided A B C D

The answer is d

Explanation:

I took the test d is correct

the use of electrical signals that transit messages is know as

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."