Which choice is best?

a. dr. caspar wistar carefully analyzed the huge bone, he however failed to recognize that it had belonged to a dinosaur.

b. dr. caspar wistar carefully analyzed the huge bone; however, he failed to recognize that it had belonged to a dinosaur.

c. dr. caspar wistar carefully analyzed the huge bone he failed to recognize that it had belonged to a dinosaur.

d. dr. caspar wistar carefully analyzed the huge bone however; he failed to recognize that it had belonged to a dinosaur?

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.