What is the theological importance of the 'Great Commission' in Matthew 28:19-20, beyond the instruction to make disciples?

A It was primarily a directive for the original apostles alone and not for all believers. B It signifies the universal scope of the Gospel message, extending salvation to all nations and people groups. C It emphasizes the importance of building large church buildings in every city. D It was a temporary measure implemented due to the urgency of Jesus' imminent return.