One container has 28 kilograms of flour and another has 4 kilograms.

How many kilograms must be taken from one container, so each has an equal amount of flour?

a)4

b)12

c)16

d)24

I thought the answer must be be d)24-I was thing we collect 24kg of flour from the first container both containers will have the same quantity of 4kg.

The text I am using says I am wrong(no explanation)

Anyone sides with my answer?

Thanks