It is possible that future spacecraft will be slowly propelled through almost empty space within the solar system, not by jets of gas, but by the force of photons of sunlight pushing on thin plastic sails.
(A)It is possible that future spacecraft will be slowly propelled
(B)It is possible for future spacecraft to be propelled slowly
(C)Future spacecraft could be propelled slowly possibly
(D)Future spacecraft could possibly slowly be propelled
(E)It could be possible that future spacecraft be propelled slowly
我主要想請教一下
這題雖是(A)
那(B)主要的錯誤
以及何種狀況可用(B)比較好啊