Pluto because it is so small or the sun if you count that because it is the hottest thing in the entire universe
Cos(2θ) = cos²θ - sin²θ = (1-sin²θ)-sin²θ = 1-2(7/9)^2 = -17/81
I think the answer here is D. A seems wrong because it involves your opinion as a writer which should not be involved in a description. B is wrong because you should always assume that the reader knows nothing about the subject when writing a description. C is wrong because all steps should be outlined in a description. Finally, D is correct because a description should be detailed and easy to follow. Hope that helps!