Red Light is used as a dancer signal because

A. it is pleasing to the eye

B. it has a traditional colour

C. it is easily distinguishable

D. it is most sensitive to the human eye

Please do not use chat terms. Example: avoid using "grt" instead of "great".

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  13. At what temperature do the Fahrenheit and Celsius scales give the same reading?
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  21. The cover of a solar cooker is made of glass because
  22. The attraction of unlike molecules at the common surface is known as
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  26. The function of a moderator in a nuclear reactor is
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