The answer is C long and bloody
Economic, political and social.
Instability was from the Treaty of Versailles left many countries bitter for they did not get fully compensated for the war. Germany, especially, experienced economic and political issues bc they had to be a republic and pay billions in reparations. Russia was faced with a revolution and struggled with famine and inflation. Europe was faced with even more instability after the stock market crash of 1930.
The correct answer is D.
Wealthy families had their own private galleries, and they financed artists. And because they financed the artists, the artists would always include them in the painting somewhere.
First used by british military command during world war 11, the term middle east is generally used to describe the region in south west asia and northeastern africa.