Which of the following are true statements about members of the united nations? i. there are currently 192 member nations in the un. ii. all united nations members agree to try and solve their disputes peacefully. iii. member nations of the united nations may use force in self-defense. a. i only b. i and ii only c. ii and iii only d. i, ii, and iii

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.