How can a business leader create an environment of transparency?

There are many different ways to create a transparent environment. Sometimes it depends on the type of business. Some I think can work well are,
1. Regular Town halls and those that are needed to convey something important. These should be set up for in person audiences and for those who can't attend..broadcast it.
2. Be honest, once you are caught in a lie, you'll never be trusted
3. Company newsletters through email and hard copies available where they can be found.
4. I think that in order to create this type of environment, a business must trust its employees.

A- the queen isn’t specified which one so its to capitalized same with nuclear reactors and atomic power plant (aka they aren’t proper nouns)

Can you choose anything?