Novamalt Inc., a manufacturer of health drinks, plans to introduce its new range of woman health drinks into the market. It involves a specialized marketing research firm to forecast the sales of this product. The research firm analyzes past buying behavior of customers and uses time-series analysis for making the sales forecasts. Which of the following information bases is being used by the research firm in this scenario?
A) what people say
B) what people do
C) what people have done
D) what people will do
E) what people speculate
Answer: C