Definition of charter

Explanation:

charter is a document, issued by a sovereign or state, outlining the conditions under which a corporation, colony, city, or other corporate body is organized, and defining its rights and privileges

would it be plagiarism to copy and paste off of here? ?

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."