Answer:
C. visible
Explanation:
Well, you can't see ultraviolet light. Nor can you exactly see gamma or infrafred light. Visible light seems like the more reasonable answer.
Neurological - by nerves
Endocrinological - by blood and secrets
XYY disorder is a hereditary condition in which a human male has an additional male (Y) chromosome, giving an aggregate of 47 chromosomes rather than the more regular 46. The "XYY" chromosome hypothesis drop out of support as a clarification for criminal conduct is on account of thought most lawbreakers don't have XYY and everybody with XYY is not a criminal
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