You are given a passage. Using the information present in the passage, you need to classify it into one of the 10 topics: 0 - 'Society & Culture', 1 - 'Science & Mathematics', 2 - 'Health', 3 - 'Education & Reference', 4 - 'Computers & Internet', 5 - 'Sports', 6 - 'Business & Finance', 7 - 'Entertainment & Music', 8 - 'Family & Relationships', 9 - 'Politics & Government'.

Example input: Optical mice use an LED and a camera to rapidly
capture images of the surface beneath the mouse.
The infomation from the camera is analyzed by a
DSP (Digital Signal Processor) and used to detect
imperfections in the underlying surface and
determine motion. Some materials, such as glass,
mirrors or other very shiny, uniform surfaces
interfere with the ability of the DSP to
accurately analyze the surface beneath the mouse.

Since glass is transparent and very uniform, the
mouse is unable to pick up enough imperfections in
the underlying surface to determine motion.
Mirrored surfaces are also a problem, since they
constantly reflect back the same image, causing
the DSP not to recognize motion properly. When the
system is unable to see surface changes associated
with movement, the mouse will not work properly.
Example output: 4
Example explanation: The passage talks about optical mice or mouse throughout which is a part of computer system. Thus, it is correctly classified to "Computers & Internet"
Q: I had a root canal two years ago, and practically drove myself insane worrying about the potential health impact of it down the road. Other than the first few days, I've never had any significant pain or discomfort. I've come to the realization that since I'm only in my early 30's, I'd rather take the risk with a root canal and keep my tooth, rather than have it yanked and either be toothless or pay a lot of money for other options that would still involve putting foreign substances in my mouth. So, I guess my recommendation regarding root canals would be that if you are a healthy person, with a good immune system, a root canal would probably be a good option, rather than losing your tooth. But, I do believe they could impact your health, and the decision should be an informed one.
A:
2