271. In one company, 30% of men and 20% of women contribute to a supplemental retirement plan. Furthermore, 45% of the company’s employees are women. Calculate the probability that a randomly selected employee is a woman, given that this employee contributes to a supplemental retirement plan. (A) 0.09 (B) 0.23 (C) 0.35 (D) 0.45 (E) 0.55