女，45岁，咽喉不适，异物感。体检：仅见慢性咽炎改变，结合图像，最可能的诊断为()

A．正常表现

B．会厌征

C．颈椎退变

D．食管型颈椎病

E．以上都不是

Which of the following statements is least accurate with regard to the efficiency of monopolistic competition （）

A. Consumers benefit from brand name promotion and advertising.

B. Promotion and advertising enable consumers to make more informed decisions.

C. Monopolistic competition is at least as efficient as perfect competition.