Ageothermal power plant can be used to generate electricity:

only near the ring of fire
in areas where deposits of water are heated inside earth
in areas where the ground stays warm all year
anywhere in the u. s.

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.

the answer would be b i believe