Answer:
a. prefer familiar objects to unfamiliar ones
Step-by-step explanation:
The mere exposure effect, in psychology, refers to the fact that people tend to develop a preference for certain objects just because they are familiar to them. This effect says that the more we are exposed to a familiar likeable object, we tend to increase our likeness for the object.
Therefore, according to the mere exposure effect, humans tend to a) prefer familiar objects to unfamiliar ones.