Which of the Following Is True of the Techniques Used

Which of the following is true of the techniques used for forecasting exchange rates?

A) Very few forecasts are completely accurate because of unexpected events that occur throughout the forecast period.
B) The human element involved in forecasting exchange rates perfect the techniques.
C) Fundamental analysts estimate the timing, magnitude, and direction of future exchange rate changes using charts and models of past data trends.
D) Technical analysts often consider a country's balance-of-payments situation while forecasting exchange rates.