The first to photograph war, made 3,500 photographs covering both sides of the u. s. civil war.

The answer is 'Mathew Brady' the American photographer, he is well known for his political photographs and portraits of the American civil war which shows the both sides of the American civil war.

Mathew Brady is frequently all the alluded on as those adore for music, something he imparts to him father for photojournalism and known to as much documentation of the civil war. As much photographs, What's more the individuals he commissioned, needed a colossal effect looking into social order In the time of the war, and keep on finishing with the goal today. 

I’m pretty sure that the answer is b.