There the Germans made a propaganda film starring Alex, the youngest corporal in the Nazi army — a role model for the master race. (Para. 12)
A、There the Germans made a propaganda film about Alex, who was the youngest corporal in the Nazi army and a good example as a master.
B、There the Germans made a propaganda film in which Alex played the leading role — the youngest corporal in the Nazi army and a good example for others to follow.