To which document do the statements in the box apply? --signed by king john --gave english nobles and church leaders certain rights that not even the king could take away -- change the english people's whole idea of justice and goverment --demonstrated that limits could be put on the power of a king. a.) royal charter b.)magna carta c.)english bill of rights d.)engish compact

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."