Answer:
D. His improvements allowed the steam engine to run more efficiently on oil instead of coal.
It helped power the trains and steam boats.
Answer:
A. A print or online encyclopedia
C. A government agency's website (ending in .gov)
D. A journal, letter, or other primary source
Answer:
The Whigs went up to go against Andrew Jackson's democratic party.
I think this is right, sorry if it's not.
The Boston massacre was partially the colonists fault because they were harassing the British soldiers by throwing, sticks, rocks and snowballs at them. The soldiers panicked and many accounts say that they heard someone yell fire.
Hope this helped! If you have any questions please ask!