Detailed Instructions: In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Among the entities, try to find the best entity that is most likely to fill in "_" and classify the answers based on options.
Q: (CNN) Several powerful lobbying groups are lining up to oppose the latest Republican effort to repeal and replace Obamacare. The influential American Medical Association, AARP and two major hospital groups all came out against a new amendment unveiled this week that would let states to weaken some of Obamacare's key protections for those with pre-existing conditions and for older enrollees. The so-called MacArthur amendment, authored by moderate Rep. Tom MacArthur of New Jersey, would let states allow insurers to offer less comprehensive policies and to charge people more based on their health status. It would also let insurers hike premiums for those in their 50s and early 60s.Republicans unveiled a new amendment they hope would bridge a party divide over health careSeveral large lobbying groups are lining up against the suggested legislation 
 Questions:_ slammed the amendment, saying it would put in place "backdoor cuts" to the protections and would create an "age tax." (A) Republican (B) Obamacare (C) American Medical Association (D) AARP (E) MacArthur (F) Tom MacArthur (G) New Jersey (H) Republicans
A:
(D)