The ultimate question is the question to the universe and how it all started and such
It is b and d. I think. I learned about this....
The rest of the answers have been done before the emperor.
I am not completely sure about this question but I think that they came from Asia to the America's. I hope this helps you :)
Answer:
Kerosene allowed better lighting throughout the country.
Explanation:
When kerosene refinement became possible, kerosene became a very cheap and affordable fuel for virtually all citizens of the country, making it a strong fuel to be used in lamps, when the country did not have an electric lighting system efficient as today.
In some underdeveloped countries where electricity is still deficient or poorly distributed, kerosene is still used to light houses at night when sunlight is not available.
Vassals is the word i think you're looking for.
