Which of the following sentences is punctuated correctly?
A. August 27, 2004; April 16, 2009, and August 7, 2012 are important dates to remember.
B. August 27, 2004; April 16, 2009; and August 7; 2012 are important dates to remember.
C. August 27, 2004; April 16, 2009; and August 7, 2012 are important dates to remember.