Although Mark begins administering first aid when he notices his 8-month-old son coughing, his son becomes unconscious. What should Mark do next?
D. Mark should call 911 check for airway blockages and begin mouth to mouth breathing

Mark should call 911 and then should start infant CPR and after each set check for anything in the mouth before doing rescue breaths.

Explanation:

^^

The correct answer is: “Mark should call 911, check for airway blockages, and begin mouth-to-mouth breathing.”

Explanation: I did my study and took the test - this was right :)

again, you should probably take him to the vet. goodluck