Sam is training for the marathon. He drove 12 miles from his home to the Grey Hills Park and then ran 6 miles to Red Rock, retraced his path back for 2 miles, and then ran 3 miles to Rock Creek. If he is then n miles from home, what is the range of possible values for n?
A. 1 n 23
B. 3 n 21
C. 5 n 19
D. 6 n 18
E. 9 n 15
A. 1 n 23
B. 3 n 21
C. 5 n 19
D. 6 n 18
E. 9 n 15