Answered

Would it be A?

What portion of the electromagnetic spectrum can human eyes detect?

A.
visible light

B.
visible light and infrared light

C.
infrared light

D.
infrared light and ultraviolet light



Answer :

AL2006

Well, there's a very definite reason why a certain sliver of the electromagnetic
spectrum is called "visible". 

The meaning of the word 'visible' is 'can be seen with eyes', and that's the label
given to the part of the electromagnetic spectrum that can be seen with eyes.
It doesn't include infrared or ultraviolet radiation, because those cannot be seen
with eyes.  Only the 'visible' wavelengths can.


LilNil

The answer is visible light.