It would be C because the ozone layer blocks out harmful radiation from reaching the surface of earth. Hope this helps! - cat
B. i think an extended period of rain.
<span>Harvey has had en episode of Gate-control theory. The gate control theory of pain asserts that non-painful input closes the "gates" to painful input, which prevents pain sensation from traveling to the central nervous system. Therefore in Harvey's case, his presentation was so stimulating to him that the experience and moment of it suppressed his pain momentarily.</span>
Had the same question i pick C. got it correct hope this helps
