A tax practitioner can avoid IRS penalty relating to a tax return position:

Multiple Choice choose one correct answer:

a$.$ if the position is frivolous and disclosed on the tax return.

b$.$ if the position has a realistic possibility of being sustained by the IRS or courts.

c$.$ if there is substantial authority to support the position.

d$.$ if the position has a reasonable basis and is not disclosed on the tax return.

e$.$ None of the choices are correct.