Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to measure for a storm door [title] Check for any obstructions. [step] Before you take any measurements, you should first have a quick glance around the doorway to check for any potential obstructions that would affect the installation of your storm door. [substeps] Look for the placement of door handles, exterior lights, the mailbox and even the doorbell.

Ending1: If you encounter anything suspicious, tear off a piece of cardboard and then tape underneath it to make it tidy. If you have metal doors, use a piece of cardboard and tape underneath the knobs with enough scotch tape so that you can easily get your hand under it. Ending2: In some cases these items may interfere with the installation of the storm door or prevent it from closing properly. If this is the case, you may need to relocate them or switch to smaller door handles. Ending3: If you have any doubt about the placement of these information you can always call a plumber. Never get your porch door installation involved with a storm door. Ending4: You can also measure door handles yourself if the weather permits. Some storm doors have them placed on various balconies, meaning they require extra attention to reflect sunlight.

Answer format: ending1/ending2/ending3/ending4