What is the range of frequencies are our eyes sensitive to?

A. 3x10⁹ - 3x10¹¹ Hz
B. 3x10¹¹ - 4x10¹⁴ Hz
C. 4x10¹⁴ - 7.5x10¹⁴ Hz
D. 7.5x10¹⁴ - 3x10¹⁶ Hz​