What should you do with keys if someone has been drinking too much?

Answer: C — Hide the keys to the bike

When someone has been drinking too much, the safest course of action is to hide the keys to their bike. This prevents the intoxicated person from being able to operate the vehicle, which is crucial for the safety of both the rider and others on the road. Operating a motorcycle while under the influence significantly increases the risk of accidents. By taking away access to the keys, you are actively preventing a potentially dangerous situation before it unfolds. This action shows a responsible attitude towards the well-being of the individual and the larger community. The other options pose risks; returning the keys enables the impaired individual to ride, handing the keys to a bartender may not ensure that the keys are kept safe or out of reach of the rider, and leaving the keys in the ignition invites the possibility that the person might attempt to ride, further endangering themselves and others. Thus, hiding the keys is the most effective option to ensure everyone's safety.