Final answer:
Juanes is displaying symptoms such as impaired communication and social withdrawal, which are indicative of Autism Spectrum Disorder (ASD), a neurodevelopmental disorder affecting social interaction and communication. The correct option is C.
Step-by-step explanation:
Juanes, who is 2 years old, presents with symptoms of severely impaired communication, withdrawal, and a lack of responsiveness to affection. Based on these signs, he is most likely to be diagnosed with Autism Spectrum Disorder (ASD). ASD is a neurodevelopmental disorder characterized by a range of symptoms including impaired social interaction, communication difficulties, repetitive behaviors, and often a strict adherence to routines.
While other conditions like ADHD, Down syndrome, and major depression can also affect communication and behavior, the specific combination of social withdrawal and communication challenges are hallmark traits of autism.