单选题

请写出下面程序的输出：

Question

请写出下面程序的输出：

#include <iostream>
using namespace std
unsigned int GetTestNum() {
    static unsigned int a = 0  
    static unsigned int b = 1  
    int c = a + b
    a = b
    b = c
    return c
}
int main(int argc, char* argv[]) {
    for (int i = 0 i < 9 i++) {
        GetTestNum()
    }   
    cout << GetTestNum() << endl
}

A. 1

B. 144

C. 89

D. 55