Suppose That a Currency's Value Is Found to Be Overvalued

Suppose that a currency's value is found to be overvalued by using purchasing power parity. Then

A) the currency will depreciate in the future but we don't know when.
B) the currency will appreciate in the future but we don't know when.
C) the interest rate in the country will change in order to restore purchasing power parity.
D) we know when and how much the currency will appreciate.
E) we know when and how much the currency will depreciate.