Answer:
O B. They had more opportunities in white collar jobs.
Explanation:
no one will be able to answer this without context
Answer: Treaties
Explanation:
During the build-up to WW1, countries in Europe formed alliances to protect themselves in case war broke out.
They formed these alliances by signing treaties amongst themselves.
The Triple Alliance was formed from a Treaty between Germany, Austria-Hungary and Italy while the Triple Entente was as a result of a Treaty between Britain, France and Russia.