Answer:
Option C Lack credibility among customers.
Step-by-step explanation:
The reason many products failed is that the quality of the product is not good and this results in the failure to make sales above breakeven points. This customer behavior is all because they want a superior product or an average product. The customer who buys superior product will pay higher than the average quality product. So lack of credibility of product among customers lacks customers acceptance of product in the market.