Which Line in the Following Program Will Cause a Compiler $\quad$

Which line in the following program will cause a compiler error?
1 #include <iostream>
2 using namespace std;
3 int main()
4 {
5 $\quad$ int number = 5;
6 $\quad$ if (number >= 0 && <= 100)
7 $\quad$$\quad$ cout << "passed.\n";
8 $\quad$ else
9 $\quad$$\quad$ cout << "failed.\n";
10 $\quad$ return 0;
11 }

A) line 3
B) line 6
C) line 7
D) line 9
E) None will cause an error