A 2-year-old boy is brought for a well-child visit. His parents express concern that he does not make eye contact, rarely responds to his name, and has limited vocabulary, using only a few single words. He often plays alone, lining up his toys, and throws tantrums when his routine is disrupted. What is the most appropriate screening tool to administer at this visit?
✓ Correct Answer: Option B
The child's symptoms (poor eye contact, not responding to name, repetitive play, routine disruption, language delay) are highly suggestive of an autism spectrum disorder. The M-CHAT-R is a validated screening tool specifically designed to identify young children at risk for autism.