It is definitely C) the demand for slaves grew to keep up with the increased production.<span>
</span>
Answer: President has to inform Congress within 48 hours of prior notice.
I'm 100% sure, the answer is B. German invasion of Poland.
The Germans invaded Poland, and crossed Poland to Russia, where they broke the treaty with the Soviet Union.
Afterwards, the Soviet Union joined the Allies, and WWII began.
Hope this helps!:)
