A zoologist is trying to find out whether rabbits need vitamin C in their diet. Assuming that a sufficiently large number of rabbits is used and adequate controls are applied, the best design of experiment would be to give the rabbits: a an artificial diet of pure protein, carbohydrate, fats, minerals and vitamins but lacking vitamin C b an artificial diet as above but with extra vitamin C c a natural diet of grass, carrots, etc. but with added vitamin C d natural food but of one kind only, e.g. exclusively grass or exclusively carrots?
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zoologist is trying to find out whether rabbits need vitamin C in their diet. Assuming that a sufficiently large number of rabbits is used and adequate controls are applied, the best design of experiment would be to give the rabbits: a an artificial diet of pure protein, carbohydrate, fats, minerals and vitamins but lacking vitamin C b an artificial diet as above but with extra vitamin C c a natural diet of grass, carrots, etc. but with added vitamin C d natural food but of one kind only, e.g. exclusively grass or exclusively carrots?
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