Jasmin's dog weighs 58 pounds. Her vet told her that a healthy weight for her dog would be less than or equal to 40 pounds. Jasmin's dog can lose an average of 1.5 pounds every week. Select all the possible number of weeks for which her dog can be at a healthy weight.
A. 10
B. 11
C. 12
D. 13
E. 14
F. 15