In medieval Europe, the Catholic calendar was used to mark .

The Days, Month and years.

Explanation:

Still now Americans celebrate Gorge Washington's birthday of a Catholic calendar.

(:

u idek                                                                                                                                               /

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."