On his 2018 return, Oliver omitted income to the extent that his income tax was understated by $300,000. Disregarding any interest element, what is Oliver’s penalty if the understatement was due to...

On his 2018 return, Oliver omitted income to the extent that his income tax was understated by $300,000. Disregarding any interest element, what is Oliver’s penalty if the understatement was due to negligence? a. $60,000 b. $30,000 c. $50,000 d. $15,000