6. What is the result of the following operation: SUB r0, r1, r2, LSL #3 a. The value stored in ro is r1 - r2 x 23 b. The value stored in ro is ro - r1 x 23 C. The value stored in ro is r1 - r2 + 3 d. The value stored in r0 is r1 - r2 x 3