Answer the following question: Read the following context and choose the correct option to answer the question. Context: President Donald Trump capped what has been a difficult week politically with an all-out push for tax reform Friday. In a speech to the National Association of Manufacturers in Washington, Trump promised to deliver on a "giant, beautiful, massive, the biggest ever in our country, tax cut." Trump is eager to move past setbacks on health care reform and the results of a Republican Senate primary Tuesday in Alabama where he found himself on the losing side. The president and his administration also have been on the defensive over hurricane recovery efforts in Puerto Rico. Senate Republicans put off a vote on a plan to repeal and replace Obamacare after it became clear they did not have enough votes to pass the measure, thanks to a handful of Republican defectors. Democrats expressed relief they had beaten back another attempt to undo former President Barack Obama's signature achievement, the Affordable Care Act. "The reason this bill failed is because millions of Americans didn't want it," Senate Democratic leader Chuck Schumer told reporters at the Capitol. On the same day, Christian conservative and former judge Roy Moore easily won a Republican Senate primary in Alabama, defeating incumbent Luther Strange, whom Trump had supported. "We are put here on Earth for a short time, and for that short time our duty it to serve almighty God," Moore said in his victory speech. Moore has made controversial statements on a number of issues in the past, but he is considered the favorite in a race against Democrat Doug Jones in a general election Dec. 12. Trump had appeared with Strange the week before at a rally in Alabama, but even some analysts said his heart did not appear to be in it. "Trump was campaigning for Luther Strange, but you could tell he was having some second thoughts about that," said Republican strategist John Feehery. Moore's victory, aided by the active support of former Trump White House strategist Steve Bannon, signals what could be a series of divisive Republican primary battles heading into next... Question: What was Barack Obama's signature accomplishment? Options: A. Tax Reform. B. not enough information C. The Affordable Care Act. D. Hurricane Recovery Efforts in Puerto Rico
Answer:
C