In the Rosenthal and Fode (1963) Study Involving "Maze Bright

In the Rosenthal and Fode (1963) study involving "maze bright" and "maze dull" rats,

A) rats who were genetically superior ("maze bright") were better able to run a maze than rats who were genetically inferior ("maze dull") .
B) rats were able to run a maze better in bright light ("maze bright") than in low light ("maze dull") .
C) students who were told that their (randomly selected) rats were "maze bright" ended up with rats who were better able to run mazes than students who were told that their rats were "maze dull."
D) All of the above.