Students should be treated equally, regardless of race, religion, and gender. This creates an environment most conducive to learning.

Which best combines these sentences using an infinitive phrase?

Treating students equally regardless of race, religion, and gender will create an environment most conducive to learning.
An environment most conducive to learning is created by students being treated equally regardless of race, religion, and gender.
If students are treated equally regardless of race, religion, and gender, then this will create an environment most conducive to learning.
To create an environment most conducive to learning, students should be treated equally regardless of race, religion, and gender.