Answer:
(D) The first introduces a policy that the argument seeks to evaluate; the second provides grounds for holding that the policy is not needed.
Step-by-step explanation:
As per the question, option D best describes the role played by the two boldfaced portions as it correctly elucidates that the first statement(bolded) offers proposes a policy while the second offers the contradiction and suggests that there are alternative ways to attain the goals and thus, implies a counterclaim that 'holding the policy is not needed'. This description invokes a healthy argument through claim and counterclaim and yet does not exclaim that policy is 'un-effective'. Thus, option D is the most appropriate answer.