An electronic card that serves as an interface to an atm is known as

Debit card is the answer (apex)

the values of the selma marchers was to bring   their ability to vote into law. mlk was not hat march, which was protesting toward lbj

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."