Which of the following does not declare a 2-by-2 array and set all four of its elements to 0?

Question

a. array, 2> b;
b[0][0] = b[0][1] = b[1][0] = b[1][1] = 0;
b. array, 2> b = {0};
c. array, 2> b;
for (auto const &row : b) {
for (auto &element : row) {
element = 0;
}
}
d. All of the above initialize all four of the array elements to

Answer 1

d. All of the above initialize all four of the array elements to 0.