Answer
See the explanation
Work Step by Step
An instruction of the form DROS (Data Register Operand with Offset and Scaled Index) in Section 8.7 offers advantages over an instruction of the form DRXY by allowing for more flexible addressing modes, enabling the inclusion of offset and scaled index values. This enhances the versatility of operand addressing.
In the case of the form DRXS as described in question 4 of Section 8.7, it provides an advantage over the form DR0S by allowing a non-zero value in the scaled index, offering increased flexibility in addressing operands with a scaled index.
