According to the passage, ______as the employees’s own business applies to the management of human resources in American companies

A．They lived in large groups.
B．They used sand as insulation.
C．They kept fires burning constantly.
D．They faced their homes toward the south.

A．He lost the final chance to win a championship.
B．He was knocked out during one contest.
C．He broke a bone in the wrist during a match.
D．He was awarded with a $1.5 million house.