Consider the code snippet below. Which of the assignments are valid in the end of the main method?

public class X
{
    public static void main(String[] args)
    {
        String s = "s";
        String[][] matrix = {{s,s},{s,s}};

        //Assignment here.        
    }
}

A) Object t1 = matrix
B) Object[] t2 = matrix;
C) Object[][] t3 = matrix;
D) String t4 = matrix;
E) String[] t5 = matrix;
F) String[][] t6 = matrix;