**Core Concept**
Autism, also known as Autism Spectrum Disorder (ASD), is a neurodevelopmental disorder characterized by difficulties with social interaction, verbal and nonverbal communication, and repetitive behaviors. The exact cause of autism is still unknown, but it is believed to involve a combination of genetic and environmental factors.

**Why the Correct Answer is Right**
The correct answer is one of the options that is not typically associated with autism. Autism is often characterized by difficulties with social interaction, such as difficulties with eye contact, understanding tone of voice, and developing and maintaining relationships. Individuals with autism may also exhibit repetitive behaviors, such as hand flapping, body rocking, or repeating words or phrases. Additionally, they may have difficulties with verbal and nonverbal communication, such as delayed or absent language development, or difficulties with understanding and using nonverbal cues like facial expressions and body language.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is a characteristic of autism. Individuals with autism often have difficulties with social interaction, which can manifest as difficulties with eye contact.
**Option B:** This option is also a characteristic of autism. Repetitive behaviors, such as hand flapping or body rocking, are common in individuals with autism.
**Option C:** This option is another characteristic of autism. Individuals with autism often have difficulties with verbal and nonverbal communication, including delayed or absent language development.

**Clinical Pearl / High-Yield Fact**
It's essential to recognize that every individual with autism is unique and may exhibit different symptoms and characteristics. A diagnosis of autism should be made by a qualified professional, such as a psychologist or psychiatrist, after a comprehensive evaluation.

**Correct Answer:** D.