Dsmod.exe-a. incorrect: dsrm deletes a group. deleting a group will not solve the problem.b. correct: you can use dsmod with the scope switch to change the scope of groupa to a universal group, then to a global group. you will then be able to add groupa to groupb. this is a tricky question. sometimes questions are not quite what they appear to be about on the surface. this question was not about using commands or even about adding one group to anotherit was about group scope.c. incorrect: dsquery searches active directory for objects. it cannot make a change, so it will not solve the problem.d. incorrect: dsget retrieves an attribute of an object. it cannot make a change, so it will not solve the problem.