Mr. Angle says a heterogeneous swarm of robots will take care of the house instead of ______.

A．The goals of the employees.
B．The objectives of the organization.
C．The structure of the organization.
D．The personal prospect of the leader.

A．Outstanding teachers like Professor Johnson are rare.
B．Professor Johnson has won a million dollars as an award.
C．Professor Johnson is likely to get the benefits from the school.
D．There are many teachers as good as Professor Johnson.