Which One of the Following Occurs When Interest Rate Parity

Which one of the following occurs when interest rate parity exists between countries A and B?

A) Country A investors are indifferent between risk-free investments in countries A and B
B) Forward exchange rates for countries A and B must be equal for all time periods
C) Risk-free interest rates in countries A and B must be equal
D) Spot and forward exchange rates between the currencies of the two countries must be equal
E) Significant covered interest arbitrage opportunities between currencies A and B must exist