Cindy Byrd donated stock (capital gain property) to a public charity that she has long supported. She purchased the stock 4 years ago for $100,000, and on the date of the gift, it had a fair market value of $300,000. What is her maximum charitable contribution deduction for the year on this contribution of stock if her AGI is $500,000?

a. $90,000.

b. $100,000.

c. $150,000.

d. $300,000.