Which of the Following People Is Most Likely to Be

Which of the following people is most likely to be diagnosed with autism?

A) Ryan, a five-year-old who is retarded but has a special ability to relate well with others
B) Paul, a two-year-old who avoids people and spends long periods of time flipping his fingers
C) Ben, a six-year-old who has a history of depression
D) Anne, a ten-year-old who just recently has begun to withdraw from others