Choose all that apply. what are three characteristics of the great wall of china?

(these are the options for this question that might help the next person if they are included)

a)longest humanmade structure at more than four thousand miles

b)actually constructed from a series of smaller walls that were connected together

c)completed by the Qing Dynasty

d)built to guard against Mongol invaders

e)located along the southern border of China

2b2t

explanation:

2b2t