What Did Eduard Bernstein Claim in His Book Evolutionary Socialism

What did Eduard Bernstein claim in his book Evolutionary Socialism ?

A) The only hope for the workers was a violent revolution.
B) Socialism could best be achieved through the democratic process.
C) Unions should bargain with employers and avoid politics.
D) The poor were too ignorant to be allowed to vote.
E) True communism would take hundreds of years to evolve.