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You and a fellow lifeguard are giving ventilations using a BVM. You position the mask over the victim's mouth and nose. What should the other lifeguard do?

  1. Ensure that the mask is sealed

  2. Open the airway with the thumbs

  3. Position fingers behind the jawbone

  4. Squeeze the bag with both hands

The correct answer is: Ensure that the mask is sealed

The other options are incorrect because B: Opening the airway with the thumbs is not necessary when giving ventilations with a BVM. The mask being sealed and delivering the proper breaths is the main priority. C: Positioning fingers behind the jawbone is also not necessary as the mask should already be properly positioned over the mouth and nose. D: Squeezing the bag with both hands is only necessary for delivering the correct amount of breaths and should not be the other lifeguard's responsibility. Their role is to ensure the mask is sealed and to monitor the victim's response.