Multi-choice problem: Continue writing the next sentence in this paragraph:

How to bump a lock
Start with an ordinary key.
Find a key that fits into the lock you're attempting to bump. The teeth of the key won't be the right size or dimension to move the pins, so the key won't turn, but it's important that it be able to slide inside.

(1). Newer products often don't fit over the top test screw, which means that the key may not work properly and the pin or internal key will have a scratch. Whatever your key's size, it should be able to slide all the way back into the lock.
(2). This is important for preventing accidental slips and falls. If possible, use an object that's sharp enough so you won't break the lock or start the loosening process over.
(3). Locks and keys come in all different makes, but many keys will fit into a standard cylindrical home lock. If you're fashioning your own bump key, pick a key that you don't use regularly.
(4). Holding the key with either your thumb or index finger, pull the pins out with one hand, close your other hand, and then carefully slide the key out. Note that this method should do a lot more if you have longer locks.
(3).