The color filter that a person need to choose is option  (a) blue.
The reduction of  the wavelength of the light is one that tends to make the aperture to be bigger if it is said to be relative to the light wavelength, by rising  the resolving power. So, one need to  choose a blue filter.
The Blue light filter is one that can act by  lowering  the amount of blue light that is shown  on the screen of telescope device.
note that the blue light can tends to  suppress the creation of melatonin thus making it to  be filtering it out.
Therefore, based on the above, The color filter that a person need to choose is option  (a) blue.
Learn more about color filter  from
https://brainly.com/question/14407604
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