请选择ABCD'I)H7o:I/J:S/A4H8B There are thirty-three benches （板凳） of two kinds. One has three legs and the other has four. There are one hundred legs in all （总共）. How many benches are there with three legs and how many with four?1y)r/v:k3W/U)^:g
A．32 three-leg and 1 four-leg1y)r/v:k3W/U)^:g
B．31 three-leg and 2 four-leg1y)r/v:k3W/U)^:g
C．32 four-leg and 1 three-leg1y)r/v:k3W/U)^:g
D．30 three-leg and 3 four-leg1y)r/v:k3W/U)^:g