Rosie Owned Stock in Acme Corporation That She Donated to a University

Rosie owned stock in Acme Corporation that she donated to a university (a qualified charitable organization) on September 6,2011.What is the amount of Rosie's charitable contribution deduction assuming that she had purchased the stock for $20,100 on October 22,2010,and the stock had a value of $28,200 when she made the donation?

A) $8,100.
B) $20,100.
C) $24,150.
D) $28,200.
E) None of the above.