关于语句#include＜iostream＞using namespace std;void main()cout＜＜100.8989663＜＜'';com＜＜fixed＜＜100.8989663＜＜'';cout＜＜scientific＜＜100.8989663＜＜'';的输出结果为( )
A．100.899 100.898966 1.008990e+002
B．100.8989663 100.898966 1.008990e+002
C．100.899 100.898966 1.008989e+002
D．100.899 100.8989663 1.008989e+002