The best response is that "Our best guess is that ADHD results from an interaction of several factors."
What is ADHD?
This is known as Attention-deficit/hyperactivity disorder and it is a mental illness which is characterized by limited attention and hyperactivity.
The risk factors ranges from genetic to environmental conditions which is why interaction of several factors is the most appropriate choice.
Read more about ADHD here https://brainly.com/question/10002219
