Answer:(c)
Step-by-step explanation:
To say Forecast are usually wrong is incorrect as Forecasting involve estimating the future event which may deviate from actual result slightly, but can give a good approximation to judge the future event. But if we want exact data then it can be wrong.
Also, Forecasting can be Qualitative therefore it might not involve numbers. This type of forecasting involves a panel of experienced persons who forecast the future event based on their past experiences.