question: angle CAB = 90.0, angle ABC = 72.0, AD is the angle bisector of angle CAB, and crossing point C is the high line CE on the AD side in triangle ACD, then the degree of angle ECD is ()
  Choices:
  A:63°
  B:45°
  C:27°
  D:18°
query_wo: Please directly answer the question and provide the correct option letter, e.g., A, B, C, D.
  Question: angle CAB = 90.0, angle ABC = 72.0, AD is the angle bisector of angle CAB, and crossing point C is the high line CE on the AD side in triangle ACD, then the degree of angle ECD is ()
  Choices:
  A:63°
  B:45°
  C:27°
  D:18°
query_cot: Please first conduct reasoning, and then answer the question and provide the correct option letter, e.g., A, B, C, D, at the end.
  Question: angle CAB = 90.0, angle ABC = 72.0, AD is the angle bisector of angle CAB, and crossing point C is the high line CE on the AD side in triangle ACD, then the degree of angle ECD is ()
  Choices:
  A:63°
  B:45°
  C:27°
  D:18°
question_for_eval: angle CAB = 90.0, angle ABC = 72.0, AD is the angle bisector of angle CAB, and crossing point C is the high line CE on the AD side in triangle ACD, then the degree of angle ECD is ()
  Choices:
  A:63°
  B:45°
  C:27°
  D:18°