Which of the Following Statements Is True

Multiple Choice

Which of the following statements is true?

A) In trend analysis,the independent variable is time only if the equation is linear.
B) The number of time periods in centered moving average is always even.
C) If the seasonal index for December sales is 120,this means that December sales tend to be 120% as high as the "average" month.
D) The cyclical component of a time series refers to repeating patterns that have a period of a year or less.