What indexes will be examined as the middle element by a binary search for the target value 8 when the search is run on the following input arrays? What value will the binary search algorithm return?

a. int[] numbers = {1, 3, 6, 7, 8, 10, 15, 20, 30};

b. int[] numbers = {1, 2, 3, 4, 5, 7, 8, 9, 10};

c. int[] numbers = {1, 2, 3, 4, 5, 6, 7, 8, 9};

d. int[] numbers = {8, 9, 12, 14, 15, 17, 19, 25, 31};