The rhetorical device you would use to create a feeling of unity between yourself and your audience is first-person plural mode of address.
Using the pronoun <em>we </em>will include both yourself and your audience and create a sense of oneness, so to say. You are all united, which makes your readers feel closer to you as the author.
A, B and D
All of those would reach mass amounts of people.
The answer is true because that’s what a therapist does
