What voltage is commonly used for hard drives and optical drives?

A) + 3.3 V, + 12 V
B) -5.0 V, + 12V
C) + 5.0 v, + 12V
D) 115 V, 220V

Commonly, hard drives and optical drives use a voltage of +5.0 V and +12 V. Option C is the only one that provides this combination. Option A is incorrect because it only provides 3.3 V instead of 5.0 V. Option B is incorrect because it provides -5.0 V instead of +5.0 V. Option D is incorrect because it provides AC voltage instead of DC voltage required for electronic components like hard drives and optical drives.