When Lúcia plays golf at the Rolling Hills golf course, she loses about 12 balls on average. Wher she plays golf at the Meandering Meadows golf course, she loses about 8 balls on average. If Lúcia lost approximately 100 balls after playing at Rolling Hills r times and Meandering Meadows m times , which of the following equations best represents the relationship between and m?

A) 8r+12m=100
B)12r+8m=100
C)12r-8m=100
D)8r-12m=100