Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to caulk the kitchen sink [title] Make sure the rim of the sink is clean and dry. [title] Remove any old caulk from the rim with a utility knife. [title] Cut through the old caulk and pull it free from the rim.

Ending1: [step] The gap between the old caulk and the rim was created when you inserted a pin into it. [title] Take a sharp knife and carefully cut a piece of old caulk and pull it away from the rim. Ending2: [title] Ensure that there is no caulk around the rim. [title] Take the pipe nuts, making sure to repair and replace the pipe nuts if necessary. Ending3: [title] Clean up the area with a paper towel soaked in rubbing alcohol to remove any old caulk residue and to ensure a clean surface ready to accept new caulk. [title] Let the sink's rim and counter edge dry completely. Ending4: [title] Reposition the rim once more, reverse the procedure on the other side of the sink counter to re-caulk the front of the sink. [title] Mark the depth of the sink under the sink faucet.

Answer format: ending1/ending2/ending3/ending4