Answer: 2. Political instability
Explanation: According to the Treaty of Versailles, which officially ended the First World War, Germany was flagged as the main culprit for war, forced to reduce arms and military, lose part of the territory, and had to pay war damages. All this affected the great political and economic instability of Germany between the two world wars, which led to the rise of Nazism and the launching of the military industry, which will prove to be the factor that led to the Second World War.