When you first started your new business, you were so excited about the large volume of orders you had. One year later, you find that your orders are less than half of what they were in the beginning. What is the most probable cause of this decrease in order?

A. You've limited yourself to a small number of products.

B. You have too much competition.

C. Your price is too high for the market.

D. You failed to continue your marketing efforts.