B would be really effective I'm sure but I don't know because D kind of hooks me. Probably the answer is B but D panders to me personally for some reason. But it's safe to say that this: "For several years after the death of her husband Albert, Queen Victoria of England remained in mourning." is a little bit more clear than this: "Queen Victoria of England remained in mourning for several years after the death of her husband, Albert." and it varies the sentences pretty effectively.
