question: Hint: Please answer the question and provide the correct option letter, e.g., A, B, C, D, at the end.
  Question: As shown in the figure, the light source P is directly above the crossbar AB, the shadow of AB under the light is CD, AB ∥ CD, AB = 2.0, CD = 5.0, the distance between point P and CD is 3.0, then the distance between AB and CD is ().
  Choices:
  (A) \frac{6}{5}
  (B) \frac{7}{6}
  (C) \frac{9}{5}
  (D) \frac{15}{2}