P-TV and QRS-TV Are Trying to Decide Whether to Air

Multiple Choice

P-TV and QRS-TV are trying to decide whether to air a sit-com or a reality show in a given time slot. Viewers like both sit-coms and reality shows, but sitcoms are more expensive to produce than reality shows since real actors need to be hired. QRS-TV makes its decision first, and then P-TV observes that choice before making its decision. Both stations know all of the information in the decision tree below. P-TV will air a sit-com:

A) only if QRS-TV is also airing a sit-com.
B) only if QRS-TV is airing a reality show.
C) no matter what QRS-TV does.
D) never.