Bryson is picking green beans. He already has picked 1 1/4 bushels and picks at a rate of 7/8 of a bushel each hour. The equation 7/8h+1 1/4=6 can be used to represent h, the number of hours it will take him to pick 6 bushels. What is the value of h?

A. 4 5/32 hours
B. 5 3/7 hours
C. 5 17/28 hours
D. 8 2/7 hours