If residents of two different states had a legal dispute, would it be handled by a federal or a state court?

Jurisdiction is a court's authority to hear and decide cases. Concurrent jurisdiction both the state and the federal courts may try crimes because they violate both state and federal crimes. Both court systems may also hear dispute between citizens of two different states over a lawsuit.

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."