How did the Civil War affect African Americans in North Carolina? Check all that apply. a. Some escaped to the North and became free.
b. Many remained enslaved in North Carolina.
c. Some served as blacksmiths and carpenters.
d. All immediately gained their freedom.
e. Some worked as spies during the war.
f. Few fought in battles in the war.

Dr. redbull conducts a study to determine whether her new energy drink children perform better on spelling tests. she randomly assigns children to one of two groups: group 1 receives her energy drink and group 2 receives water. she then gives both groups a spelling test and compares the results. which of the following is true about this study? a. group 1 is the dependent variable and group 2 is the independent variable. b. this is a correlational study. c. group 2 is the experimental group. d. the independent variable is the type of drink the children receive.