This book mainly focuses on Shakespeare, but it also _________ other playwrights as well.

A．appliances
B．facilities
C．apparatus
D．equipment

A．The transformation process of a department store from inputs into outputs is different from that of a farm.
B．The conversion process of a department store from inputs into outputs is the same as that of a farm.
C．The transformation process can be totally free from random fluctuation.
D．Random fluctuation is important to the conversion process.