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

How to cut copper pipe
Select an autocut tool.
If you're cutting copper pipe in a tight space (such as up against a corner), use an autocut tool. Measure the diameter of the pipe you want to cut and purchase an autocut tool for that exact size.

Options are: 1. Autocut tools are spring loaded so you won't be able to adjust the size of the cut. For example, for a small 1/2 inch (12 mm) pipe, buy a 1/2 inch (12 mm) autocut tool.; 2. Be sure you're using a high quality autocut tool and not a cheap one. Obviously, a cheap autocut tool costs a lot more (usually the higher the quality of the tool).; 3. You can also buy autocut knives online or at a hardware store. Make sure you can read the instructions that came with the autocut tool before you start cutting.; 4. Autocut tools generally can be found online or in workshops near you. If you already own an autocut tool, you can measure the diameter of the pipe by ordering one online, or working with a tool at your local hardware store.;
The answer is:
1.