Tucker, a single taxpayer, actively participates in a rental real estate activity. During the year, his total rental real estate income was $$25,000.$ His only other income for the year was $$185,000$ in wages. He does not have any adjustments to income, nor does he have any expenses allocable to investment income. How much of Tucker's income is subject to the net investment income tax?

$$0$

$$10,000$

$$25,000$

$$210,000$