**Core Concept**
Autism Spectrum Disorder (ASD) is a neurodevelopmental disorder characterized by impairments in social communication, social interaction, and repetitive behaviors or interests. The core features of ASD include challenges with social interactions, verbal and nonverbal communication, and restricted, repetitive patterns of behavior, interests, or activities.

**Why the Correct Answer is Right**
High intelligence is not a characteristic that defines or is exclusive to individuals with Autism Spectrum Disorder. While some individuals with ASD may have average or above-average intelligence, others may have significant cognitive impairments. In fact, research suggests that approximately 25% of individuals with ASD have an average or above-average IQ, while 25% have a low IQ (less than 70). The variability in cognitive abilities among individuals with ASD is a key aspect of the disorder.

**Why Each Wrong Option is Incorrect**
**Option A:** Motor abnormalities are not a defining characteristic of Autism Spectrum Disorder, although some individuals with ASD may exhibit motor issues, such as clumsiness or delayed motor skills. However, motor abnormalities are not as core to the diagnosis as social communication and interaction impairments.

**Option B:** Less eye contact is a common feature of Autism Spectrum Disorder, as individuals with ASD may have difficulty initiating or maintaining eye contact due to difficulties with social interaction and understanding social cues.

**Option D:** Unusual gestures are a characteristic of Autism Spectrum Disorder, as individuals with ASD may exhibit repetitive or unusual behaviors, including hand flapping, body rocking, or other motor mannerisms.

**Clinical Pearl / High-Yield Fact**
Autism Spectrum Disorder is a spectrum, and individuals with ASD can exhibit a wide range of cognitive, social, and behavioral abilities. It's essential to avoid making assumptions about an individual's intelligence or abilities based solely on their diagnosis of ASD.

**✓ Correct Answer: C. High intelligence Individuals with Autism Spectrum Disorder may have a wide range of cognitive abilities, and high intelligence is not a defining characteristic of the disorder.**