B. In order to determine the value of one share after it is selling ex-rights, we simply need to subtract the value of the right from the price of the share when it was selling rights-on. The formula for determining the value of one stock right when the price of the stock is rights-on is Ron= Pon - S/(N + 1) If: Ron= market value of one right when the stock is selling rights-on. Pon= market value of one share of stock with rights-on. N= number of rights necessary to purchase one share of stock. S= subscription price per share. Putting the information from the question into the formula, we get [(60 - 54) / (4 + 1)]. Solving the formula, we get $1.20 as the value of the right when the share is selling rights-on. Subtracting this $1.20 from the rights-on price, we get the value of the share when it is selling ex-rights. So, the value of the share ex-rights is $58.20 ($60 - $1.20).

C. This answer is incorrect. See the correct answer for a complete explanation.

D. This answer is incorrect. See the correct answer for a complete explanation.