By Guaranteeing That All Participants in Its Dance Classes Will

By guaranteeing that all participants in its dance classes will be able to do the foxtrot by the end of their first lesson or their money will be refunded, the Fred Astaire Dance Studio is:

A) Managing its service promises
B) Resetting customer expectations
C) Precisely matching service delivery with service promise
D) Managing its horizontal communications
E) Under-promising and over-delivering