William, owner of a small hardware store, likes to forecast sales to better prepare for seasonal fluctuations. He identifies as many target markets as possible and predicts the sales for each based on one-day sales at different times of the year. He then combines the predictions for the various segments to create a total sales forecast. Which sales forecasting method is William using?
A) Build-up method
B) Break-down method
C) Qualitative method
D) Quantitative method
