In the book of Acts, what was the primary significance of the Ethiopian eunuch's conversion and baptism, as performed by Philip?

A It demonstrated the necessity of circumcision for salvation, even for Gentiles. B It marked a pivotal moment in the expansion of Christianity beyond its Jewish roots, signifying God's acceptance of all people, regardless of ethnicity or social status. C It was a unique exception to the established rules of baptism, granted only to high-ranking officials. D It was primarily a political move to gain favor with the Ethiopian government.