What should you do if a person shows signs of a heart attack?

When a person shows signs of a heart attack, it is crucial to act quickly and effectively to increase their chances of survival. Giving them aspirin, provided they are not allergic, is important because aspirin can help to thin the blood and reduce the severity of a heart attack. It can inhibit blood clotting, allowing better blood flow to the heart. In addition to this, calling for emergency help is essential, as professional medical assistance is needed to properly address a heart attack.

Encouraging them to walk around can exacerbate their condition, potentially causing further harm. Performing CPR is only necessary if the person loses consciousness and stops breathing, not during the initial signs of a heart attack. Keeping them comfortable and waiting without taking any further action delays critical medical intervention, which is not advisable in these situations. Thus, option B encompasses the best immediate actions to take during a heart attack.