Which of these steps should always be followed for effective problem solving?
a.) developing q plan and then implementing the plan
b.) making metric conversions
c.) usinf a trial-and-error approach and then evaluating
d.) buying a large quantity of material than estimated

C

Explanation:

Because then you can see if you were right and what you need to change. Sorry if this is not a good explanation:(

the ozone layer acts as a filter for the shorter wavelength and highly hazardous ultraviolet radiation (uvr) from the sun, protecting life on earth from its potentially harmful effects. when the sky is clear, there is an inverse relationship between stratospheric ozone and solar uvr measured at the earth's surface.