Answer:
A. Confirmation bias.
Explanation:
Confirmation bias is a type of cognitive dissonance that favors information that confirms your preconceived beliefs or prejudices . In other words this error enables the person to stop collecting information when the evidence collected so far confirms one's views or biases. It is based on the notion that perceive information subjectively.
Kalends is the answer, in America, we have months, but they just called it Kalends..
i hope that this helps you. =)
I would say planning. the more time you had to plan the greater chance your travel will be successful