I believe it is C. Men and women should study together
Answer: On April 6, 1917, the United States formally declared war against Germany and entered the conflict in Europe. Fighting since the summer of 1914, Britain, France, and Russia welcomed news that American troops and supplies would be directed toward the Allied war effort.
Explanation:
A became slaves I am 90 percent sure
Two new states were added by the year 1821. Maine was added as a free state and Missouri was added as a slave state
