I'm going to help you get the answers but the answers are too much to type out for you.
Answer:
The first evidence of helium was obtained on August 18, 1868 by french astronomer jules janssen.
Explanation:
For some time helium was believed to exist only in the sun. However in 1882, Italian physicist Luigi Palmieri detected helium on earth when analyzing lava from mount vesuvius after it erupted in that year.
B. The surrender of Nazi Germany to the Allies.
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<span>C. didn't expand federal power enough.</span>