20. If a is an array of 5 integers then which of the following is the correct way to increase its size to 10 elements?20.If a is an array of 5 integers then which of the following is the correct way to increase its size to 10 elements?

A. int[] a = new int[5];
    int[] a = new int[10];
B. int[] a = int[5];
    int[] a = int[10];
C. int[] a = new int[5];
    a.Length = 10 ;
D. int[] a = new int[5];
    a = new int[10];
E. int[] a = new int[5];
   a.GetUpperBound(10);
Answer: Option D