Final answer:
Option A provides the most accurate ASD red flags, indicating significant developmental delays and impaired social skills, including poor eye contact, no babbling, and the absence of speech by 16 months.
Step-by-step explanation:
The most accurate list of Autism Spectrum Disorder (ASD) red flags from the choices provided is Option A. This list includes: having poor eye contact, no babbling or use of gestures by 12 months, seeming to be in their own world, not being interested in other children, and having no single words by 16 months. These are significant developmental concerns as typically developing one-year-old toddlers can use one- and two-syllable words such as "ball" and "mama", they understand simple commands, follow them especially if associated gestures are used, connect names with objects, and use gestures or words to refer to objects or actions. ASD is characterized by various developmental delays and impaired social skills. Frequent red flags for ASD include difficulty with eye contact, understanding social cues, and engaging in reciprocal communication, along with repetitive motor behaviors and unusual language use.