Consecration is not among the seven sacraments instituted by Christ. The institution of a new Sacrament would involve a substantial change. The context is not directly concerned with the institution of new sacraments but with the question of substantial change in the seven. These are then enumerated as 1. The rest fail to appear.
E obviously means their power of conferring grace.
Alexander III lived 500 years before the Belgian theologian. This can scarcely be called a direct proof. F correctly designates this proof as indirect. Obviously, it is the prayer of thanksgiving which contains the narrative of institution. E. misunderstands St. Thomas completely.