After the airway is opened, which of the following correctly states the proper technique for delivering mouth-to-mouth ventilation?

A. The rescuer opens the airway, seals their mouth over the victim's mouth, pinches the victim's nose closed, and gives 2 breaths while watching for the chest to rise.

B. The rescuer opens the airway, seals their mouth over the victim's mouth, and gives several small puffs while trying to avoid making the chest rise.

C. The rescuer opens the airway, seals their mouth over the victim's mouth, and gives 1 slow breath for a duration of 5 seconds.

D. The rescuer opens the airway, seals their mouth over the victim's mouth, and gives 5 slow breaths, each with a duration of 2 seconds, while watching for the chest to rise.