A factory makes candy bars and ships them in cases
. Each case contains 6 boxes of candy bars
. Each case contains a total of 144 candy bars
. Each BOX contains the same number of candy bars
What is the number of candy bars per box ?

Answer choices : A. 6 candy bars per box
B. 24 bars per box
C. 138 bars per box
D. 864 bars per box

I know its a long question but PLEASEE HELP MEH :((