One of Uber’s new norms under CEO Khosrowshahi is "We do the right thing. Period." Which of the following would have the least impact in assisting Khosrowshahi in living up to this norm? When answering, keep in mind that Uber is currently a private company.

A) code of ethics
B) screening prospective employees
C) corporate social responsibility training
D) whistle-blower protection policy
E) Sarbanes–Oxley Act of 2002