Which group of colonist came to the colonies from england, under contract to work a certain number of years

There was a group of young european workers that came to America from early 17th to early 20th century. These inmigrants would get a contract to work for an american employer during a time period, usually between 1 to 7 years. They didn't get any wages for their work, the employer paid for their subsistance and their passage to the country, but that also meant that he could restrict some of their activities, they weren't completely free. After their contract expired, they were allowed to stay in the country and sometimes they would get a small parcel of land. They were called the Indentured servitude.

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."