According to Marx, What Was the Expectation for the Future

According to Marx, what was the expectation for the future of the revolt of the proletariat?

A) The revolution of the proletariat was avoidable if the wealthy would negotiate in good faith.
B) It was desirable, because only through their own efforts and struggles would the proletariat appreciate the fruits of their labors.
C) Marx thought the revolution was imminent, and likely to start at any moment, in any country.
D) The revolt was hopeless, but that did not mean that they could stop trying to make things better.
E) The proletariat revolution was inevitable, and he expected that it might well occur while he was alive.