In 2023, Kathleen Tweardy incurs $30,000 of interest expense related to her investments. Her investment income includes $7,500 of interest, $6,000 of qualified dividends, and $2,500 of nonqualified dividends. What is Kathleen's net investment income for 2023?
A) $9,500
B) $10,000
C) $11,000
D) $11,500