The structures designed by Ralph C. Harris were fifteen- and seventeen-story buildings, and for their time, were some of the larger and more luxurious hotels and residences in existence.
A. time, were some of the larger and more luxurious hotels and residences
B. era, they were some of the larger and more luxurious hotels and residences
C. era, were some of the largest and more luxurious hotels and residences
D. time, they were some of the largest and most luxurious hotels and residences
E. era, were some of the largely and more luxuriously hotels and residences