The Figure Shown Indicates Two Diseases with Genetic Links That

Multiple Choice

The figure shown indicates two diseases with genetic links that are common in industrialized nations. The fact that both are about 80-90% avoidable indicates that

A) people are most likely avoiding having children with individuals who are affected by these diseases.
B) these diseases are Mendelian traits that are expressed more frequently in industrialized nations where the average lifespan is longer.
C) industrialized nations are able to use more resources to track these diseases in populations.
D) these diseases are most likely affected by environmental factors in addition to genes.