Andrew wants to fence a portion of this yard. He has 680 feet of fencing and plans to use half of it. The fenced area will be shaped like a righttriangles with sides in the ratio of 3:4:5. Which range describes the shrotest side of the triangle?
A. less than 40 ft.
B. from 40 ft. to 80 ft.
C. from 85 ft. to 125 ft.
D. from 130 ft. to 170 ft.