Answer:
a. confirmation bias
Step-by-step explanation:
Confirmation bias: The term confirmation is also referred to as confirmatory bias and is described as the tendency of a person to interpret, favor, and recall a piece of information in a course of action that confirms his or her perception towards that information and often leads to statistical errors.
The common type of bias includes: selection bias, confirmation bias, confounding variable, outliers, etc.
The confirmation bias leads a person to hold false beliefs and can happen in everyday life.
Agatha is demonstrating the confirmation bias.