I think B. But instead of those dots, I prefer a comma instead
<span>He deals with the analysis of the negative aspects of the french revolution. This was a Victorian theme because the Aristocracy and Oligarchs despised the french revolution as they felt it could transfer to England and would therefore and their rule. It was pretty common for high ranked members of the society in the Victorian ages to speak nothing but bad things about the revolution.</span>
B because all the others are wrong grammatically<span />
The support the sentence offers to a proposed solution is the following one:
Peer testimonial.
It is said that Lisa, a friend (a peer), uses a certain device which helps her manage her finances when it comes to paying heating bills. Therefore, a solution is proposed by offering a peer testimonial, that is, something a friend does which probably works for him or her and can work for someone else as well.