Final answer:
Huldrych Zwingli argued that the sacrament of communion was merely symbolic during his meeting with Martin Luther at the Marburg Colloquy.
Step-by-step explanation:
The reformer you are referring to who argued that the sacrament of communion was simply a symbolic commemoration of the sacrifice made by Jesus is Huldrych Zwingli. During the Marburg Colloquy with Martin Luther, Zwingli asserted that Christ was neither physically nor spiritually present in the elements of communion, which was contrary to the Catholic doctrine of transubstantiation and even differed from Luther's own view. Zwingli's stance represented one of the more radical positions within the spread of Reformation ideas, especially in Switzerland where he was based.