The media can affect us even if we are not aware that we are being influenced by it.
a. true
b. false

The question is asking us whether it is true that the media can affect us even if we are not aware that we are being influenced by it. This is true. Think for example of smoking: if you see positive personas smoke on screen (that is, people in movies who are presented in a positive light), you might develop positive associations with smoking, even if you are not thinking about it consciously.