An entrepreneur is considering hiring a marketing consultant to develop a marketing plan for a new product. Which of the following would be the most important factor in the decision of whether or not to spend the money to hire a marketing consultant?

A$.$the amount of money budgeted for the building of a factory to produce the new product

B$.$ the number of other companies who produce a product similar to the new one

C$.$the interest rate paid on the loan used to produce the new product

D$.$the number of workers who will be hired to promote the product