For unequal width of butt straps, the thickness of butt straps are
A. 0.75 t for wide strap on the inside and 0.625 t for narrow strap on the outside
B. 0.75 t for narrow strap on the inside and 0.625 t for wide strap on the outside
C. 0.75 t for both the straps on the inside and outside
D. 0.625 t for both the straps on the inside and outside