Hich of these students displays an example the impulsivity symptom ADHD?

Impulsivity symptom of ADHD:

Example A: Alex struggles to stay seated during lessons and frequently blurts out responses without waiting his turn or letting others finish speaking.

This describes impulsive behaviors such as difficulty controlling actions or thoughts in the moment, without considering potential consequences.

Example B: Isabella has difficulty focusing during lessons and can't pay sustained attention to complex instructions, but doesn't display impulsive behaviors.

Choice B describes attention deficit, not impulsivity. So the correct answer is A: Alex.