Which of the following statements BEST explains the observation that more autism cases exist now than in the past?
a) doctors are more aware of the condition and have better techniques for diagnosing and reporting it
b) more parents neglect their children, which is a cause of autism, now than in the past
c) the vaccine for measles, mumps, and rubella has been established as a significant cause of autism
d) autism has been selected for in recent generations by natural selection
e) all of the above choices are correct
Answer: a) doctors are more aware of the condition and have better techniques for diagnosing and reporting it
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