Identify Which of the Following Statements Is True

Identify which of the following statements is true.

A) A penalty for substantial understatement will potentially be assessed on an individual if the underpayment of tax exceeds the greater of 15% of the tax shown on the return or $5,000.
B) Substantial authority exists for a position that is supported by a decision rendered by the Court of Appeals for the taxpayer's own circuit.
C) An individual taxpayer may be subject to a penalty for underpayment of estimated taxes if his balance of tax due when he files is $500.
D) All of the above are true.