Your Neighbor Tells You, "I'm Concerned About Vaccinating My Children

Your neighbor tells you, "I'm concerned about vaccinating my children. I understand that scientists have proved that childhood vaccines cause autism." What response to your neighbor is most accurate?

A) "Actually, no one has ever studied this thoroughly, so no one really knows."
B) "Not really; well-designed studies have been done, and the research does not support a link between vaccines and autism."
C) "Not exactly; it seems that autism is caused by an equation of environmental conditions, with childhood vaccines being one of the many variables involved."
D) "You are right; double-blind research has shown that autism is caused by vaccines."