Should you schedule regular shredding or just do a one-time purge? That question is explored in a HelloNation article featuring insights from Document Shredding Expert Rhet Crowe of Centerville, Ohio ...
KVIA: Shred ‘Em Like a Pro: AARP Texas Takes on Identity Thieves, One Document at a Time
Shred ‘Em Like a Pro: AARP Texas Takes on Identity Thieves, One Document at a Time
azcentral.com: Growing Demand for Secure Paper Shredding in Los Angeles Reflects Data Security
Businesses in Los Angeles increase secure paper shredding adoption to protect sensitive records, reduce risk, and ...
Growing Demand for Secure Paper Shredding in Los Angeles Reflects Data Security
One-to-one is used when you talk about transfer or communications. You may use one-to-one when you can identify a source and a destination. For eg., a one-to-one email is one sent from a single person to another, i.e., no ccs or bccs. In maths, a one-to-one mapping maps one element of a set to a unique element in a target set. One-on-one is the correct adjective in your example. See Free ...
"Which one is the best" is obviously a question format, so it makes sense that " which one the best is " should be the correct form. This is very good instinct, and you could even argue that the grammar is good, but at best it's unnatural.
The first example is incorrect. The second and third examples are both correct. Which one you use is mostly a matter of preference, although a hundred appears more frequently than one hundred. There is also another form, an hundred, which was common in the past, but has mostly fallen out of use. See Google Ngram Viewer: a hundred, an hundred, one hundred: