Which statement correctly describes the order of events in the development of elevators?
A)Because hotel and store operators became aware of the commercial advantages of elevating their patrons by machinery, Otis placed an elevator in a store on Broadway at Broome Street in New York.
B)After the first elevator was installed for passenger service, hotel and store operators became aware of the commercial advantages of elevating their patrons by machinery.
C)When hotel and store operators became aware of the commercial advantages of elevating their patrons by machinery, the steam engine formed the foundation of the early elevator industry.
D)As building heights increased, the steam elevator was replaced by hydraulic and electrical systems, and hotel and store operators became aware of the commercial advantages of elevating their patrons by machinery.