Definition: 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. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
Input: (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 
 Question:_ slammed the amendment, saying it would put in place "backdoor cuts" to the protections and would create an "age tax."

AARP