Consider the following main function:

// echo machine #include  #include  using namespace std; int main () { string str; while (str == "goodbye") { cout << "Enter a word: "; cin >> str; cout << "You entered: " << str << ' '; } } 

What is wrong with this function?

A. The loop condition contains a syntax error. The exclamation point is not allowed in a condition statement.

B. The loop condition will not be false, so the loop will never execute, not even once

C. The loop condition will not be true, so the loop will never stop executing.

D. The loop condition will not be true, so the loop will never execute, not even once