One Reason That the British Did Not Try to Break

One reason that the British did not try to break the Union blockade of the South during the Civil War was that  

A) they feared losing Northern grain shipments.
B) they did not want to fight against the superior American navy.
C) the British upper class had supported the North from the onset of hostilities.
D) the war caused no economic problems for Britain.
E) the South resented British interference.