When George, an American, Went to Represent His Company in a Global

When George, an American, went to represent his company in a global conference that was being held in Germany, he was unaware of the social practices of the host country. While talking to a German representative, he used the "ok" gesture, which created tension and uneasiness between him and the German representative. Which of the following communication barriers did George most likely face in the given scenario?

A) An organizational barrier
B) A cultural barrier
C) A perceptual barrier
D) A physical barrier