Repelled by bodily punishments such as maiming and branding, the idea of penitentiaries were reforms of the penal system by Quakers.
(A) the idea of penitentiaries were reforms of the penal system by Quakers
(B) penitentiaries were ideas for reform of the penal system suggested by Quakers
(C) Quakers suggested the penitentiary as a reform of the penal system
(D) Quakers suggested that the penal system be reformed as penitentiaries
(E) the penitentiary was suggested to be a reform of the penal system by Quakers


why not [spoiler]D?[/spoiler]