B. Stressful and difficult
Most of the drawings depicting the fighting on Leyte Island depict the battles at Leyte island as grim and horror-filled. Support for the "stressful and difficult" interpretation" lies in the fact that Hall chose "Devastation" and "Wounded" as names for his drawings.
True I believe the sender is
Because it made the internment of certain American citizens legitimate.
Rivalry
Colonial and imperialistic ambitions was a major contributor of rivalry and hostility that beheld western Europe in the decades before ww1. Each of the nations was seeking to out do each in strategic colonies such as Egypt, east africa,India and some provinces in Europe such as Alasce and Lorraine.