The following code segment is intended to search an integer array arr for a target value. The boolean found should be set to true if the target is present; otherwise, it should remain false. However, the code contains an error and does not function as intended.

/** Precondition:
 * - arr is an array of integers, arr.length = n.
 * - target is the value to search for.
 * Postcondition: found == true if target is in arr[0..n-1]; false otherwise. */
boolean found = false;
int i = 0;
while (i < n && !found) {
    i++;
    if (arr[i] == target)
        found = true;
}

Which of the following modifications would correct the error in the code segment?

I. Change the statement int i = 0; to int i = -1;.

II. Change the while loop’s condition to i < n - 1 && !found.

III. Move the i++; statement to be after the if statement within the loop.