Changes in sea level are not only a result of changes in water temperature, affecting water density, but of melting glaciers as well.
(A) are not only a result of changes in water temperature, affecting water density, but of melting glaciers as well
(B) not only result from changes in water temperature, which affect water density, but also when glaciers melt
(C) are a result not only of changes in water temperature, which affect water density, but also the melting glaciers
(D) result not only from changes in water temperature, which affect water density, but also from the melting of glaciers
(E) result from not only changes in water temperature, affecting water density, but as well as when glaciers melt
[spoiler]OA: B vs D. Please discuss in detail. My doubt is this that isn't not only result from x but also result from y is the right construction or result not only from x but also y is correct usage?????[/spoiler]
(A) are not only a result of changes in water temperature, affecting water density, but of melting glaciers as well
(B) not only result from changes in water temperature, which affect water density, but also when glaciers melt
(C) are a result not only of changes in water temperature, which affect water density, but also the melting glaciers
(D) result not only from changes in water temperature, which affect water density, but also from the melting of glaciers
(E) result from not only changes in water temperature, affecting water density, but as well as when glaciers melt
[spoiler]OA: B vs D. Please discuss in detail. My doubt is this that isn't not only result from x but also result from y is the right construction or result not only from x but also y is correct usage?????[/spoiler]
. If there are any options having parallel structures for words following not only but also - watch out for them as well. 
