What unique service characteristic makes issues such as capacity management and the "smoothing of demand" critical issues for marketers in the hotel/motel business and has actually led to new firms as PriceLine.com (select the best one)?

A. The variability (inconsistency) of service performance

B. The perishability (lack of inventory) of service

C. The interest level of federal regulatory agencies in service marketing.

D. The inseparability of service from the provider

E. The moment of truth triangulation component.