Madison Works for a Weed Killer Manufacturing Company

Madison works for a weed killer manufacturing company.The products have only been available in a concentrated liquid form,but now the firm is introducing a pre-mixed version that should be easier for consumers to use.Madison will most likely increase the frequency of sales calls because:

A) the available supply is limited and costly.
B) there is no competition within the sales territory.
C) demand is low for his company's older products.
D) customers are less likely to buy products from the competition.
E) his company has increased the number of product lines available.