在准备GMAT,语法SC题GWD4-Q2 不太懂,求指教.

在准备GMAT,语法SC题GWD4-Q2 不太懂,求指教.
In Greek theology the supreme being was Esaugetu Emissee (Master of Breath),who dwelt in an upper realm in which the sky was the floor,and who had the power to give and to take away the breath of life.
A.in which the sky was the floor,and who had the power to give and to take
B.where the sky was the floor,having the power to give and to take
C.whose floor was the sky,and who has the power of giving and of taking
D.in which the sky was the floor,with the power of giving and taking
E.whose floor was the sky,having the power to give and take
看了不同资料,A和D都出现做过正确答案,请大神指教,究竟A和D哪个语法有问题呢,顺带讲下B就更好了.大谢!