能任意生成正整数a和b,且a/b是整数的选项是

A、b=Int(2+8*Rnd(Timer))：c=Int(2+8*Rnd(Timer))：a=b*c;
B、a=Int(2+8*Rnd(Timer))：b=Int(2+8*Rnd(Timer));
C、a=Int(2+8*Rnd())：b=Int(2+8*Rnd());
D、a=Int(2+8*Rnd(Timer))：c=Int(2+8*Rnd(Timer))：b=a*c