25. The volume of a certain rectangular prism is $8 \mathrm{~cm}^{3}$, the total surface area is $32 \mathrm{~cm}^{2}$, and its length, width, and height form a geometric progression. Then the sum of all the edge lengths of this prism $(\mathrm{cm})$ is 
(A) 28;
(B) 32 ;
(C)
(D) 40 ;
(E) 44 .
25. Let the three edge lengths of the rectangular prism be $a, a r$ and $a r^{2}$, then volume $=a(a r)\left(a r^{2}\right)=8$, i.e., $a r=2$.
Surface area $=2 a^{2} r+2 a^{2} r^{2}+2 a^{2} r^{3}=32$ $=2 a r\left(a+a r+a r^{2}\right)$
$=4\left(a+a r+a r^{2}\right)=$ sum of all edge lengths of the rectangular prism.
(B) True.