有以下程序： #include＜iostream＞ using namespace std； int main( ) {int a=5；b=4，c=3，d=2；if(a＞b＞c) cout＜＜d＜＜end1；else if((c-1>：d) ==1) cout＜＜d+1＜＜end1；else cout＜＜d+2＜＜end1；return 0； } 执行后的输出结果是( )。

A．2

B．3

C．4

D．编译时有错，无结果

Mr. Johnson ______ his boss ______ his careless mistake.

A．apologized; about

B．apologized to; about

C．apologized to; for

D．apologized; for