Which country has the world’s fastest-growing economy?

The answer is U.S. and China

Explanation:

hope it helps :3

China's economy did not overtake that of the U.S. by 2020, as had been projected by many. In spite of that, its economy continues to grow faster than that of the U.S.

During a period of high inflation the government actions that can preserve the Value of money are:  selling gold for use as an alternate currency, and  restricting the money supply by adjusting interest rates.

Explanation

Read more on Contractionary Monetary Policy, Reserve Requirements, and Reducing the Money Supply measures,