Mark and Kathy are married entrepreneurs. Kathy has a start-up sole proprietorship in which she works long hours. This year the business generated $500,000 of revenues and $800,000 of deductible business expenses. Mark is a partner in a new partnership, also working long hours. His share of the partnership loss for the year is $275,000. Fortunately, they both have trust funds so they are receiving $700,000 of taxable interest income and dividends in 2021. Due to this year's results, Mark and Kathy will have an NOL carryover of

A) $0.

B) $575,000.

C) $325,000.

D) $51,000.