Despite the Very Competent Doctor and the Pleasant Nurse That

Despite the very competent doctor and the pleasant nurse that attended to her, Tanya was dissatisfied with the service she received at the walk-in-clinic. She was uncomfortable because the waiting room and examination rooms were dirty and untidy. Which part of the service intangibles was overlooked?

A) attitude
B) availability and timing
C) environment
D) completeness
E) consistency