Plz help I’m being timed

Whenever we take information from another source – whether we use the information word for word or we put the information into our own words – we must use a(n) right after where the research occurs in the paper.

Ican’t find this question here can y’all tell me the awnser?

Which choice is a major detail from paragraph two? a) the great wall is a large network of several walls and towers. b) the great wall looks like a long wall snaking its way across china. c) the great wall was constructed over hundreds of years beginning in 221 b.c. d) the great wall construction encouraged several independent kingdoms to unite.