a是大于0的自然数,b=a+1,那么a和b的最小公倍数是请选择DCBA*G/I2\9j0p6F2@(D2D8s+n;k0|:O
A.b+n;k0|:O
B.a+n;k0|:O
C.1+n;k0|:O
D.ab+n;k0|:O