Answer:
Correct answers are:
the inhumanity of war in the 20th century
the tyranny of the Spanish Civil War
the bombing of innocent people by German allies
Explanation:
the inhumanity of war in the 20th century - This is a broad but accurate description. Guernica encapsulates the universal horror and indiscriminate suffering of modern warfare.
the tyranny of the Spanish Civil War - Guernica is a very specific indictment of the violence and cruelty of the Spanish Civil War.
the bombing of innocent people by German allies - The bombing of the town of Guernica by Nazi Germany and Fascist Italy, acting on behalf of the Spanish Nationalists, was the direct inspiration for the painting.