Sexuality research has become fragmented over the last few decades

Professor Golder is studying hyperactivity in preschool age children. She is concerned that differences in child rearing, diet, and so forth may affect her results

To minimize these potential preexisting variables, she should be sure to do which of the following? a. Use random assignment when forming her groups. b. Include an independent variable. c. Include a dependent variable. d. Assign boys to the experimental group and girls to the control group. e. Include multiple confounding variables.

Babies who are breastfed are at lower risk for

A) blood clots. B) diarrhea. C) jaundice. D) toothache.