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, A, B, and C are the three points on ⊙O, if ∠C = 35.0, then the degree of ∠OAB is ()
  Choices:
  (A) 35°
  (B) 55°
  (C) 65°
  (D) 70°