Why was Robert E. Lee confident marching into the North before the Battle of Gettysburg?

A. He had won most of his recent battles
B. He knew the land in Pennsylvania better than the Union
C. He had a spy giving him secret information on the Union forces
D. He know George Meade feared him

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.