In the history of the hotel industry, thecharacteristicsofthecommercial hotel periodwas that( )
A.
the hotel facilities were Primitive , and the price was low.
B.
the h otel s o ffered luxury facilities and services , and t he expense was prohibitive.
C.
the h otel s were clean , comfortable , and affordable.
D.
famous hotel chains expand ed rapidly all over the world .