A clothing store sells T-shirts, t, for $8 a shirt, and shorts, s, for $12 each. The
 store earned $180 revenue last month. The store sold three times as many T-
 shirts as shorts. Using the method of substitution, how many T-shirts and
 shorts did the store sell?
 O
 A. t= 15; s= 5
 t= 8; s = 12
 c. t= 5; s = 15
 O
 O
 D. t= 12; s = 8