Generally, in China the car market is        between the imported cars and the home-made cars. The former are quite expensive while the latter much cheaper.

A．limited

B．separated

C．divided

D．parted

有以下程序： #include ＜iostream＞ using namespace std; class B { private:int a,b; public:B(){}B(int i,int j);void printb(); }; class A { B C; public:A(){}A(int i,int j);void printa(); }; A::A(int i,int j) :c(i,j) {} void A::printa() {c.printb (); } B::B(int i, int j) {a=i;b=j; } void B: :printb() {cout＜＜a＜＜", "＜＜b＜＜end1; } int main () {A m(7,8);m.printa();return 0； } 该程序运行后的输出结果是( )。

A．5,6

B．7,8

C．8,9

D．9,10