Which One of These Statements Is Correct

Which one of these statements is correct?

A) Since the early 1980s, it has become increasingly more difficult to do a stock repurchase due to SEC regulations.
B) It is relatively easy to determine whether or not a firm has completed a planned stock repurchase.
C) Fixed stock repurchases allow managers to repurchase shares only when they feel those shares are undervalued.
D) A fixed stock repurchase plan could be a negative net present value investment for the stock issuer.
E) Stock repurchases send the exact same signals to investors as do cash dividends.