The hot, humid weather made the work exhausting.
Answer: B. the spread of slavery into the West.
Explanation:
It was an established fact in the years leading up to the Civil War that the South was pro-slavery and the North was Anti-slavery and so both sides had arguments about the spread of slavery into the western territories as those territories gained statehood.
The South wanted slavery to spread into the territories so that they would have more states which would give slavery more representation in Congress and therefore keep the practice going. The North wanted the territories to be free for the same reason.
The Supreme Court here in Roe v. Wade used the compelling interest test.
To put it simply the compelling interest test is used by the court, federal or state, to check the if the law is constitutionally valid. In the Roe v. Wade case the Supreme Court had to see if the right to privacy of the 14th Amendment is applied to abortion and they decided it did. They used the compelling interest test to balance this with the state's interest in the welfare of women and the potential human life that is the baby. So the court limited state's regulations on abortion.
The allied nation consisted of the United States, Great Britain, U.S.S.R (Russia), Australia, France and many more...i hope i helped