DrHinson Wants to Investigate If Rats Fed a Diet Enriched

Dr.Hinson wants to investigate if rats fed a diet enriched with omega will do better at a maze learning task then when these same rats are given a normal diet.He has a total of 30 rats for his experiment.If Dr.Hinson fails to implement the appropriate changes to his experiment a potential confound may be_____.

A) order effects
B) disturbance variance
C) ceiling effect
D) Both a & b