The best answer would be B. :)
According to Aristotle, plot is the most important element of tragedy.
Answer:
Britain incurred 715,000 military deaths (with more than twice that number wounded), the destruction of 3.6% of its human capital, 10% of its domestic and 24% of its overseas assets, and spent well over 25% of its GDP on the war effort between 1915 and 1918 (Broadberry and Harrison, 2005).
Explanation:
the natural barriers were the himalaya mountains
