Place the events in order from earliest to latest. 
 A Battle of Fort Sumter, battle of Gettysburg, General Lee surrenders, Florida secedes
 B Florida secedes, battle of Fort Sumter, battle of Gettysburg, General Lee surrenders
 C Battle of Fort Sumter, Florida secedes, battle of Gettysburg, General Lee surrenders
 D Battle of Fort Sumter, Battle of Gettysburg, Florida secedes, General Lee surrenders