You Are Studying the Rising Incidence of a Certain Subtype

You are studying the rising incidence of a certain subtype of cervical cancer in Oceania, and are curious to know whether environmental factors are the dominant cause of the disease. You collect the incidence statistics from indigenous populations as well as from two different immigrant populations in three different countries, as shown in the following table. Do these data appear to be consistent with a dominant role of environmental risk factors (E) or a genetic background (G) for this type of cancer? Write down E or G as your answer.