Ultraviolet rays. a). Is the major cause of skin color evolution

b). Is strongest at the equator

c)Can penetrate the skin and helps produce Vitamin D

d). All of the above

D

Explanation: All the information is correct about Ultraviolet rays

icc, international association for cereal chemistry

we can conclude that the melting point of table salt is above room temperature (it's actually 801 deg c). the melting point of mercury must be below room temperature (- 39 deg c).