This question checks awareness of monetary policy actions taken by major economies.
United States of America: Partly correct but incomplete. The US Federal Reserve ran several rounds of quantitative easing after the 2008 financial crisis, buying bonds to inject money into the economy.
United Kingdom: Partly correct but incomplete. The Bank of England also used quantitative easing after 2008 to support its economy.
Japan: Partly correct but incomplete. The Bank of Japan used large scale quantitative easing for years to fight deflation and boost growth.
All of the above: Correct. All three, the US, UK and Japan, used quantitative easing in the last decade, so this is the complete answer.