Identify the diameter(s) of circle O.

A circle O with a diameter AC, radius OB and chord BC
A. modifying above upper B upper C with bar
B. modifying above upper A upper C with bar
C. Modifying above upper O upper A with bar, Modifying above upper O upper B with bar, Modifying above upper O upper C with bar
D. Modifying above upper O upper A with bar, Modifying above upper O upper B with bar, Modifying above upper O upper C with bar, Modifying above upper B upper C with bar

D. Modifying above upper O upper A with bar, Modifying above upper O upper B with bar, Modifying above upper O upper C with bar, Modifying above upper B upper C with bar.

The correct answer is C. The diameter(s) of circle O are AC.