Respuesta :
Twain's account of Colonel Rall's speech ("full of gunpowder and glory") is contrasted most vividly to the Marion Ranger's collective remorse over the shooting of an unarmed rider. The correct option among all the options that are given in the question is the second option or option "B". I hope it helps you.
I believe the answer is: B. the shooting of an unarmed rider.
In the speech, there is a dark connotation that made by the speaker when he mentioned the shooting of unarmed riders who are not willing to conform to their orders. Especially to the lower ranks who are bound by the orders from higher officers.