Answer: D). Use the jaw-thrust maneuver.
Step-by-step explanation:
Facial trauma involves like laceration may obstruct the air passage and may restrict the breathing and ventilation. Thus an air way passage should be created so as to make patient breath and survive.
In jaw thrust maneuver the index as well as the middle fingers push the posterior aspects of the jaw upwards and the thumb makes the chin down. This is done to open the mouth. The mandible is also moved forward and tongue is pulled forward this ensures the passage of air inside the trachea.
This method will ensure adequate air supply to the concrete finisher.