Which of the Following Behaviours Is Illegal

Which of the following behaviours is illegal?

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