Final answer:
The statement that rare cancers were 700% more common in children near a toxic landfill makes sense because it indicates that the number of rare cancers is 8 times higher in that group compared to the general population.
Step-by-step explanation:
The statement regarding rare cancers being 700% more common in children living near the toxic landfill compared to the general population can be analyzed from a statistical perspective. The use of "700% more common" is equivalent to saying that the incidence is 8 times higher in the affected group because 100% + 700% = 800%, or 8 times. Therefore, the correct answer is 'A.
The statement makes sense because the number of rare cancers found in children living near the toxic landfill is 8 times the number of rare cancers found in the general population, which is possible. The statement does not make sense because the number of rare cancers found in children living near the toxic landfill is 8 times the number of rare cancers found in the general population, which does not make sense.