A grocery store sells tangerines in 4/5 kg bags. A customer bought 4 kg of tangerines for a school party. How many bags did he buy? Select all the equations that represent the situation.
A.
4 × 4/5 = ?

B.
? × 4/5 =4

C.
4/5 ÷ 4 =?

D.
4 ÷ 4/5 =?

E.
? ÷ 4/5 = 4