The answer to this is C. The person who is about to do the CPR should know this detail first to see if the abdominal thrust can be helpful or a few pats on the back will help get rid of the dislodged item from the part of the body where it has gotten stuck. There are moments when people become choked because of other reasons.
For instance, those who have consumed live octopus may not have chewed the octopus enough. This may have caused the person to choke. This can be hard to remove too because the octopus will attach itself to the airway in a very strong manner.