The autism society () has a website that aims to those with autism by "increasing public awareness about the day-to-day issues faced by people on the spectrum, advocating for appropriate services for individuals across the lifespan, and providing the latest information regarding treatment, education, research and advocacy."

when might this website be considered a useful source for research?
a) if the research topic is "potential cures for autism"
b) if the research topic is "vaccine-preventable diseases"
c) if the research topic is "the link between vaccines and autism"
d) if the research topic is "available treatments for autism patients"