This is a test of commonsense with single/multi-choices. Complete the next sentence:

How to open cable ties
Find the locking mechanism.
If you look at a ready-to-use cable tie, notice that one end tapers to a point, while the other is capped with a tiny cube. When used, the pointy end is fed through a slot in the cube to form a loop and then pulled tight.

OPT: * The cube is the locking mechanism that keeps the tie from worming back out through the slot, so look for that. Bend the tie's loose end back.; * Doing this typically only takes half a minute, but it can also take up to a day, depending on the size of the cube. Look for a locking mechanism that has small cubes on it.; * The cubes often have individual locking mechanisms and may be located at random. The locking mechanism used on most new cable ties will be located toward the top of the square-shaped end of the cable tie.; * This allows some of the dead cable to pass through so that the two ends of the cord each remain separated. Use a nut if the locking mechanism is plastic or sturdy.;
The answer is:
The cube is the locking mechanism that keeps the tie from worming back out through the slot, so look for that. Bend the tie's loose end back.