Which of the Following Sentences Best Motivates Action in a Persuasive

Which of the following sentences best motivates action in a persuasive message?

A) We know that you'll want your employees to complete our ethics training program, so we'll drop by tomorrow to finalize the contract.
B) If you think that our ethics training program might benefit your employees, we hope you'll consider hiring us.
C) The ethics training we provide will help your employees effectively resolve workplace-related ethical dilemmas. Please call me by August 1 so that your training sessions can begin by August 15.
D) All of these choices would effectively motivate action.