Research studies have documented that chicken eggs are a

Research studies have documented that chicken eggs are a good proxy to show the effects of various substances on human fetuses. The results of a new study showed that acute exposure to cell phone radiation caused an increased incidence of birth defects in chickens. The eggs were exposed to cell phone radiation continuously throughout the 21-day incubation period from an emission source placed 6 centimeters away from each egg.

Which of the following can be logically concluded from the above passage?

A. Pregnant women should avoid excessive amounts of cell phone radiation in the vicinity of the womb.
B. If the emission source had been placed closer to the eggs, the incidence of birth defects would have been even higher.
C. Pregnant women should not allow cell phones within 6 centimeters of their abdomens at any time during the pregnancy.
D. Radiation was the sole cause of the birth defects in the chickens.
E. In this case, the results will not be relevant for humans because the primary consequence was thinning of the eggs' shells, which then resulted in the birth defects.

Source: Peterson