As shown in the figure, triangle ABC is inscribed in circle O, OC perpendicular  OB, OD perpendicular  AB intersects AC at point E. Knowing that the radius of circle O is 1.0, then the value of AE^ 2 + CE^ 2 is ()
Choices:
A:1
B:2
C:3
D:4
Please directly answer the question and provide the correct option letter, e.g., A, B, C, D.
Question: As shown in the figure, triangle ABC is inscribed in circle O, OC perpendicular  OB, OD perpendicular  AB intersects AC at point E. Knowing that the radius of circle O is 1.0, then the value of AE^ 2 + CE^ 2 is ()
Choices:
A:1
B:2
C:3
D:4
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: As shown in the figure, triangle ABC is inscribed in circle O, OC perpendicular  OB, OD perpendicular  AB intersects AC at point E. Knowing that the radius of circle O is 1.0, then the value of AE^ 2 + CE^ 2 is ()
Choices:
A:1
B:2
C:3
D:4