Final answer:
Before diagnosing ADHD, it is essential to rule out Autism spectrum disorder, Intellectual disability, and Sleep disorders as they can exhibit similar symptoms.
Step-by-step explanation:
Before diagnosing a child with Attention Deficit Hyperactivity Disorder (ADHD), it is crucial to rule out several other conditions because they can present symptoms that mimic those of ADHD. These conditions include Autism spectrum disorder (ASD), which can affect social skills and behavior; Intellectual disability, which can impact the child's ability to learn at the expected level for their age; and Sleep disorders, which can lead to problems with attention and behavior due to lack of restful sleep. Therefore, the correct answer is d. All of the above.