Suppose you want to set up an experiment to test the hypothesis that electromagnetic fields cause ccd, and you have 6 hives to work with. which of these is the best experimental setup?
a. 6 hives exposed to high levels of emf
b. 5 hives exposed to high levels of emf and 1 hive with no emf exposure
c. 3 hives exposed to high levels of emf and 3 hives with no emf exposure
d. 2 hives exposed to low emf levels, 2 hives exposed to medium emf. levels, and 2 hives to high emf levels

D. 2 hives exposed to low EMF levels, 2 hives exposed to medium EMF. levels, and 2 hives to high EMF levels

Explanation:

If you want to test if electromagnetic field cause CCD, the hives should be exposed to different levels because you want to check in general whats is the effect of it over the population. I would say the set up is still missing a control group which should not be exposed to magnetic field but live in similar conditions.

Answer B. provides a control group but the results obtain would be valid for only high intensity EMF.

yes it is weird but true