Which activity might be observed when an officer reaches a heart rate of 200 bpm?

When an officer reaches a heart rate of 200 beats per minute, it typically indicates a state of extreme physical stress or exertion. At this elevated heart rate, the body is often in a fight-or-flight response, leading to heightened levels of adrenaline and physiological changes that can impact mental functioning.

Under these conditions, the brain's ability to process information rationally can be compromised. The officer may experience heightened anxiety, reduced logical thinking, and impaired decision-making abilities. This can manifest as irrational behavior, where the individual may act impulsively or without clear judgment due to the overwhelming physiological response.

In contrast, rational decision-making, calm assessment of surroundings, and effective communication require a more stable and lower heart rate, allowing for better cognitive function and emotional control, which is unlikely when experiencing such intense physical stress. Thus, the likelihood of irrational behavior under extreme heart rates makes this the correct answer.