In One Study, Participants Were Shown a Film About a Family

In one study, participants were shown a film about a family on welfare and then asked for their opinions about welfare. Prior to viewing the film, half of the participants were told that the film showed a highly unusual case. The other participants were told that the film showed a quite typical case. After viewing the film, participants were asked their opinions about welfare. On the basis of other evidence, we would expect to find that

A) both groups of participants were influenced equally by the film.
B) neither group of participants was influenced by the film.
C) participants who were told that the case was unusual were less influenced by the film than those who viewed the typical case.
D) participants who were told that the case was unusual were not influenced by the film.