What Was the Outcome of the Opium War

What was the outcome of the Opium War?

A) Despite technological advantages, the British forces were overwhelmed by the Chinese numerical superiority and were unable to penetrate China?s isolation.
B) The British soon swept the seas of opposition, but were prevented from entering China by opposition from other European powers who feared Britain?s overthrow of the Manchus.
C) The British victory was so overwhelming that the Manchu dynasty was overthrown by 1850 and replaced by a republic.
D) British victory in the Opium War allowed European powers to force China to open trade and diplomatic exchanges.