You examined the iq scores of children at several high schools. you finally select two high schools where thechildren appear similar in terms of iq scores, family income, family religion, and the like. you match two classesfrom each grade (9 to 12) from each high school. in one high school you plan to offer a course on study skills inthe selected classes and in the other high school you plan to have students follow their "normal" curriculum. afterobtaining permission from the principals, parents, and children to do your research, you arrive at the first school tobegin the study skills class. you find that the classes you had selected are on field trips and that the principalassigned a different class at the same grade level to you. this illustrates the problem(s) of: logistics and administrative control only. logistics only. logistics, administrative control, and ethics. ethics only. administrative control only.