Answer:
c.confirmation bias
Step-by-step explanation:
Confirmation bias is one kind of cognitive biases. It includes favoring information that confirm or support our existing beliefs or previous biases. So, we remember, recall, and interpret information that support our existing ideas better and more easily than those that oppose our ideas.
Here, Mrs.Zumpano has an existing bias i.e. boys are naughtier than girls, so she watches boys more than girls and looks for signs that support her belief.