The correct answer is: A. 36 percent
The Earth’s atmosphere reflects about 36% of the sun’s radiation back into space. This is done by the gases in the atmosphere, such as nitrogen and oxygen, as well as by clouds and dust particles. The remaining 64% of the sun’s radiation reaches the Earth’s surface, where it is absorbed and used to heat the planet.
Option B is incorrect because it states that 47% of the sun’s radiation is reflected back into space. This is higher than the actual percentage, which is 36%.
Option C is incorrect because it states that 17% of the sun’s radiation is reflected back into space. This is lower than the actual percentage, which is 36%.
Option D is incorrect because it states that none of the above is the correct answer. However, option A is the correct answer.