For everyone taking the social studies early civilizations of china pretest here's the answers
1: ancestors
2: confucianism
3: used coins for the first time
4: harmony between heaven and earth and victory in battle
5: through uprisings caused by the harsh policies of legalism
6: bronze
7: on the north china plain
8: balance
9: it was centralized
10: wheelbarrow
11: farmers
i took the pretest and got 100

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."