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

How to open combination locks without a code
Familiarize yourself with the lock.
A lock has three main components. The shackle is the u-shaped piece which attaches it to an object.

Available options:
(A). Use your thumb to turn the shackle. Wrist shackle is the u-shaped piece from that lock.;
(B). The shackle was originally the padlock that will be used as the lock handle. The shackle is a small piece of wood that attaches the shackle to something that is actually a lock.;
(C). For example, a lock which attaches to a door can easily be unscrewed by hand and the shackle attached to a doorknob can be unscrewed using a small hand. Lock locks only have to be installed with the shackle attached to them.;
(D). The dial is the portion with numbers that turns. The body is the rest of the lock.;
The answer is:
(D).