Page 533 - AP Computer Science A, 7th edition

a constructor that allows a Clock to be created with three int parameters for hours, minutes, and seconds. Consider a two- dimensional array of Clock values called allClocks. A code segment manipulating allClocks is as follows:
for (Clock[] row : allClocks) for (Clock c : row)
/∗ more code ∗ /
Assuming the Clock class works as specified, which
replacement for /∗ more code ∗ / will cause an error?
I II
III
System.out.print(c); c.setTime(0, 0, 0);
c = new Clock(0, 0, 0);
(A) I only
(B) II only
(C) III only
(D) II and III only (E) I and II only
15. Consider the following method that will access a square matrix mat:
/∗∗ Precondition: mat is initialized and is a square matrix.
∗/
public static void printSomething(int[][] mat) {
for (int r = 0; r < mat.length; r++) {
for (int c=0; c<=r; c++) System.out.print(mat[r][c] + “ ”);
System.out.println(); }
}