Usually demand refers to someone tell someone else what to do, or how to do it. For example "Give me the remote." could be demanding.
Answer:
Although the nullification crisis was ostensibly about South Carolina's refusal to collect federal tariffs, many historians believe it was actually rooted in growing Southern fears over the movement in the North for the abolition of slavery.
Answer: Electoral votes are allocated among the states based on the Census. Every state is allocated a number of votes equal to the number of senators and representatives in its U.S congressional delegation-two votes for its senators in the U.S Senate plus a number of votes equal to the number of its congressional districts
Answer: The embargo caused the United States and western European countries to reassess their dependence upon Middle Eastern oil. Which basically means it led to far-reaching changes in domestic energy policy. I hope this helps!