In a Maze Learning Study, a Researcher Compares the Performance

In a maze learning study, a researcher compares the performance of laboratory-bred rats and wild rats, hoping to find that the wild rats are better. Which of the following is true?

A) the null hypothesis is that wild rats will learn faster than lab rats
B) a Type II error would be to find a difference in the study when no true difference exists
C) a Type I error would be to find no difference in the study when a true difference exists
D) if wild rats really are better, but the researcher fails to reject the null hypothesis, then a Type II error has occurred