As Alicia awaits the birth of her first grandchild, she says she doesn't care if it is a boy or a girl as long as the baby is healthy. When she holds her new granddaughter for the first time, Alicia reveals that she knew all along that her daughter would have a little girl. Alicia's barrier to rational reasoning in this instance is a case of:
a. hindsight bias
b. confirmation bias
c. a mental set
d. justification of effort