X owns 60% and his friend, F, owns 40% of a partnership. After transferring 20% of the capital and profits interest to his daughter, D, X's interest drops down to 40% of the partnership. After guarant

X owns 60% and his friend, F, owns 40% of a partnership. After transferring 20% of the capital and profits interest to his daughter, D, X's interest drops down to 40% of the partnership. After guaranteed payments, partnership profits of $50,000 were allocated as follows: $20,000 to X, $20,000 to F and $10,000 to D. 

X performs services for the partnership and receives a guaranteed payment if $10,000; capital is not an income-producing factor. Which of the following is X's includible income for the year?

$20,000

$30,000

$40,000

$50,000