People, such as pilots, who have to move quickly from lighted surroundings to night darkness use red light illuminatin. This is because
red light slows down dark adaptation.
red light is a stimulating color and tends to keep pilots and military personnel
aroused and alert.
the cones are insensitive to red light.
the rods are insensitive to red light.

the rods are insensitive to red light.

Explanation:

People, such as pilots, who have to move quickly from lighted surroundings to night darkness use red light illumination because human eye is less sensitive to longer wavelength ( rhodopsin in rods cells of eye).Using red goggles,the cones can receive enough light to provide photopic vision. Whereas rods are less sensitive to longer wavelength (red light).So, the crew members remains dark adopted.

Hence, (d) is the correct answer.

i would say the answer is food.

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