Please choose the correct ending to complete the given sentence: Education and Communications: [header] How to make a mobius strip [title] Cut a strip of paper about 6 inches (15 cm) long and 1.5 inches in width. [step] When cutting the strip, the measurements do not need to be accurate, these are just suggested. Try to keep the width even so that you have a long thin rectangle.

Ending1: [substeps] To simplify the process, you can simply cut down the edge of a plain sheet of paper to make your strip. [title] Label the corners of the strip a, b, c, and d. Ending2: [title] Lay the strip flat on a flat surface so that when you rub the strip with your fingers, it will move around as a book, picking up any dust or dirt as you go. [step] While there are many different types of chapters, peeled and cut strips are the most common. Ending3: You can use scissors or permanent markers for this part. [substeps] An example of an effective mobius strip strip is 2.6 inches (5.08 cm) long by 4 inches (10 cm) wide. Ending4: [substeps] You can cut strips in any size you want. For example, a strip may be about 18 inches by 11 inches in length with a length of about 2 yards.

Answer format: ending1/ending2/ending3/ending4