North Korea has a command economy.

If the current account balance is -$100 billion and the capital and financial account balance is $80 billion, then the official settlement account balance is

A) -$20 billion. B) $20 billion. C) always 0. D) impossible to determine with the information given.

Assuming the United States is the "domestic" country, if the real exchange rate between the United States and Russia decreases from 28 to 23

A) the prices of U.S. goods and services have increased by 25.5% relative to Russia. B) the prices of U.S. goods and services have decreased by 5% relative to Russia. C) the prices of U.S. goods and services have decreased by 18% relative to Russia. D) the prices of U.S. goods and services have increased by 22% relative to Russia.