Dee Says That She Has Developed Special Sunglasses to Enable

Dee says that she has developed special sunglasses to enable people to see light with wavelengths of 550-700 nanometers.Would these be useful for humans?

A) No-these frequencies are already visible to humans.
B) Yes-but only for seeing very faint lights.
C) No-unless one is looking at very bright lights.
D) Yes-these frequencies are normally outside of human range.

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