In this task, you are given a context and four options. Each option is a suggested ending for the context. You should read the context and pick the best ending for the context. Please answer with "A", "B", "C", and "D".

[header] How to fit a door handle [title] Measure 41 inches (100 cm) from the floor. [step] Although you could follow the directions that come with your handle instructions, the most common placement for a door handle is 41 inches (100 cm). Place the end of a tape measure on the floor and mark the narrow portion of your door with a pencil. <sep> (A) [substeps] You can also measure the height of the other door handles in your house and use this measurement when marking the handles. [title] Attach the door handle kit's template to the door. (B) [substeps] Make sure the measurement is accurate on both sides. [title] Mark the width and height of your door. (C) This portion of the door handle will serve as a guide, as you need to place your staple on your left-hand side. Once the rest of the door handle is directly on the floor, find the spot where the staple is (straight edge) to be applied. (D) [substeps] Once you have determined this, you can reverse the measured vertical diameter for the door handle by erasing the edges of the tape measure and taping the area you marked with super glue or tape. [title] Measure your door handle's diameter using the measuring tape.
A