Which option identifies a potentially confounding variable in the experiment described in the following scenario? A group of scientists is studying whether a certain drug causes seizures. They give the drug to mice and examine the mice to see if they have seizures. The researchers use 500 mice, split into two equal groups of 250 mice. The female group receives the treatment, while the male group serves as the control. All of the mice are either brown or white, split equally into the experimental or control groups. the gender of mice the drug the seizures the color of the mice