Trend extrapolation involves

A. extending a pattern observed in past data into the future.

B. selecting specific points on a graph of sales or market share, multiplying by the cost of living index, and allowing for a variation of plus or minus 3%.

C. averaging the total sales or market share for the previous 5 years and multiplying that number by the expected GDP growth rate for the next year (say 1.5%) to arrive at the next year's forecast.

D. selecting a given percentage and using that number as a yearly predictive base regardless of change in sales, revenue, or market share.

E. collecting projections from all regional sales managers and making the final projection.