A city council decides that if a business changes its buildings or signs, it must follow new building codes. If a sign is upgraded, the business must pay for and pass a full building inspection to be sure all new building codes are followed. Which answer best summarizes the effect this policy will have on competition?

A. Because it applies equally to all businesses, it will have little effect on competition.
B. The new policy will affect new business only and make them less competitive overall.
C. Because it improves the look of the community, it increases competition among local businesses.
D. The new policy will unfairly punish existing businesses and make them less competitive overall.