题目选项分析

As an actress and, more importantly, as a teacher of acting, Stella Adler was one of the most influential artists in the American theater, training several generations of actors whose ranks included Marlon Brando and Robert De Niro.

As an actress and, more importantly, as a teacher of acting, one of the most influential artists in the American theater was Stella Adler, who trained several generations of actors including Marlon Brando and Robert De Niro.