Which of the following is more likely to receive IRS scrutiny under the assignment of income doctrine?

A. A corporation paying its shareholders a $20,000 dividend.

B. None of the choices are correct.

C. A cash-basis business delaying billing its customers until after year end.

D. A parent employing her child in the family business.

E. A taxpayer gifting stock to his children.

This year, Betty, a single tax payer, sold her home (sales price $750,000; cost $200,000). All closing costs were paid by the buyer. She owned and lived in the home for 20 years. How much of the gain is included in gross income?

A. $550,000

B. $300,000

C. $250,000

D. $50,000

E. None