Which of the Following Behaviors Is Illegal

Short Answer

Which of the following behaviors is illegal?
Company executives encourage employees to invest in company stock while withholding information about financial problems.
An employee accepts a gift from a supplier in return for a large order.
A manager refuses to hire or promote a qualified visible minority in spite of company policy.
A manager underpays an employee, knowing that the employee can't afford to quit.
All of these actions are illegal.