The following code transposes the elements of an MM array, where M is a constant defined by When compiled with optimization level -01, Gcc generates the following code for the inner loop of the function: We can see that Gcc has converted the array indexing to pointer code. A. Which register holds a pointer to array element A[i][j] ? B. Which register holds a pointer to array element A[j][i] ? C. What is the value of M