Answer:
This question is incomplete. Here are the missing options:
The answer is a) autism spectrum disorder.
Explanation:
Autism spectrum disorder is a mental condition that affects a person's social interaction. Common symptoms are speech difficulties and repetitive behaviours, although all cases are different and the symptoms vary greatly. This is the reason it's called a "spectrum".
This disorder appears in early childhood and follows a person for his entire life. However, constant treatment may improve the patient's development in life, especially in areas such as school or work.