For wandering bards, it is________to tell the difference between reality and imagi nation.

A．There are many types of historical documents.
B．Homer's epics are about the earliest histories.
C．Ancient sagas may be related to reality.
D．There is a volcano near the coast of Sicily.

A．is excited when the robots are performing a traditional Japanese dance
B．keeps silent because he is a little unsatisfied with the new product
C．witnesses the creation of a series of entertainment robots
D．is an executive manager of Sony Corp.