A Researcher Is Interested in the Social Behavior of Mice

A researcher is interested in the social behavior of mice. He hypothesizes that mice from Strain A will be more social than mice from Strain B, and Strain B will be significantly more social than mice from Strain C. Mice from each of the three different strains (20 mice in each strain) are raised in a laboratory. The mice are group housed with members of its own strain. All the mice receive the exact same amount of food, water, and light over the first 10 weeks of life. At 11 weeks of age, each mouse is placed in a cage with a novel mouse from his own strain. The mouse's investigatory behavior toward the other mouse is timed for 10 minutes.
Given the above result, what might the experimenter do next?

A) abandon the hypothesis
B) run the experiment again with some mice group-housed and others singly-housed
C) run the same statistical tests again to see if the results change
D) both b and c