Do you know the context?
I suppose the quotation is stressing that the writer has put a lot of effort into getting their argument/grievances heard by the parliament, and that said parliament is 'tyrannical', implying that it rules without concern for the people or accountability to them. It seems that the quote may be a way of justifying some later action, essentially saying; 'we've tried and failed to do this in the proper way, so now we must be more forceful'.
The answer is D because I did the question and got it correct
Im writing this to finish a challenge
The two warring classes of The Communist Manifesto are the bourgeoisie - the capitalists, or the owners of the means of production and the working class, called the proletariat, which works for wages and does not (directly or personally) own the company they work for.