Scientists produced a mutant Ebola virus that does not express any of the soluble form of the envelope glycoprotein (sGP)but can only express the membrane bound form (GP).Which of the following explains the results of infecting cells with this mutant?

A) It caused the cells to release more virus from the cell.
B) It resulted in virus particles with higher levels of GP.
C) It allowed the immune system to attack the virus.
D) It caused the virus to produce smaller plaques.
E) It reduced the cytopathic effect caused by the virus.