What was one of the most important causes of the Russian Revolution of 1917?
A. The German occupation of Russia during World War I
B. The Bolsheviks' execution of Czar Nicholas II and his family
C. The policy of ethnic discrimination put in place by the Duma
D. Czar Nicholas II's refusal to withdraw from World War I

answer: this problem has only trivial solutions, with all points on the same line. x=5 or x=7/5.

step-by-step explanation:

there are three triangles, and three unknowns: x, y=length of middle segment, and z=cos(angles marked with red arc).

we need

and law of cosines,

the three equations are

see attached image for solution.

i believe it was spain

a they donate money to humanitarian causes

c   they volunteer to alleviate suffering

d   they blame all muslims for not being able to keep their fellow muslims in line.