Which of the Following Statements Is/are True About Time-Series Forecasting

Which of the following statements is/are true about time-series forecasting?

A) The basic strategy is to identify the magnitude and form of each component based on available past data.
B) It is used to make detailed analyses of past demand patterns over time and to project these patterns forward into the future.
C) Demand can be divided into components such as average level,trend,seasonality,cycle and error.
D) All of the above