If you're referring to the militarization and aggression of Germany, there's a lot of debate as to why these nations didn't intervene earlier. The general consensus is that nobody believed Germany would take it as far as they did.
This statement BEST describes the cause of the Zulu War of 1879:
C) The Zulu attempted to resist submitting to British rule.
After the Zulu chief was demanded to do away with native customs and way of life, disbanding the Zulu Army, accept European rule, and the discovery of diamonds leading to “the Diamond Rush”, the Zulu unsuccessfully attempted to avoid British rule. The Anglo-Zulu War lasted from January to July 1879.
B. Infrastructure =Infrastructure is a development term for the combined level of transportation networks, educational institutions and economic support.
Answer:
The stock market crashed.
Explanation:
The stock market crashed and so people got upset because then their money lowered and then people began ending lives because of the Great Depression.