|Question 15Verbal

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In the retina of the human eye, long (L), medium (M), and short (S) cone cells help process bright light and color by sending signals to the brain. M cones react to a range in the visible spectrum of light that completely overlaps with those L and S cones react to. As a result, ________
Which choice most logically completes the text?
it is possible to study the roles of L, M, and S cones because each type of cone can be activated without activating the other types.
A
L cones react only to wavelengths associated with the color red, S cones react only to wavelengths associated with the color blue, and M cones react only to wavelengths associated with the color green.
B
it is difficult to exclusively study the role of M cones in human vision under natural conditions because M cones can't be activated without simultaneously activating the L and S cones.
C
the brain more easily interprets colors in the range both L
D