Which one of the following theories has been proposed by Savigny to explain legal personality?

Savigny is a principal proponent of the fiction theory of legal personality: entities other than natural human persons are treated as persons by a legal fiction. Realist theory instead attributes a real group personality; bracket theory treats corporate personality as a way of referring collectively to individuals; purpose theory focuses on rights devoted to a purpose. Among the listed theories, fiction theory identifies Savigny’s approach.