Q$3$ Last year, Judy's employer granted her nonqualified stock options to purchase $500$ shares of employer stock at $$20$ per share. Judy exercised the options this year when the fair market value of the stock was $$30.$ What is the amount that Judy must include as W$-2$ compensation income this year?

a$.$ $$0$

b$.$ $$7,500$

c$.$ $$15,000$

d$.$ $$5,000$