Which cognitive bias is being described here?

“Ryan's parents, who are artists, are starting to
plan for their retirement. Ryan suggests they
see a financial planner to help them create the
best plan possible, but his parents think there is
nothing a financial planner will be able to tell
them that they don't already know.”

A. Confirmation bias

B. Dunning-Kruger effect

C. Bizarreness effect

D. None of the above