Which variable is the loop control variable?
Assume that all variables are of type int and that y and z
are initialized to 0.
```
for (int i = 0; i < 100; ++i) {
cin >> x;
y += x;
if ( x % 2 == 0 )
++z;
}
```
a. i
b. x
c. y
c. z
a. i
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