Britain Did Not Protest Too Loudly Against the Union Naval

Britain did not protest too loudly against the Union naval blockade of the Confederacy because

A) Britain might want to use a similar blockade in a future war.
B) the British government clearly supported the Union.
C) it would have been useless to try to run the blockade.
D) profits were not high enough to justify the risk.
E) the blockade was very ineffective in cutting off shipments of commercial goods including cotton from the Confederate ports to Britain.