B)OPTION B only 1 is your answer.
Well it depends do u want it in rational form or fraction from or?
From the figure, we can conclude that the little triangle is an isosceles triangle, the greatest angle is 90 because ∠A = 90 and they are supplementary, therefore, using the triangle sum theorem:
(4/7)^3=.1865
6xyz/2xz simplifies to 3y