Concept:The Early Church's fellowship began with the outpouring of the Holy Spirit at Pentecost, which is recorded in Acts 2.
Explanation:Pentecost was the day the Holy Spirit descended upon the apostles and other believers in Jerusalem.
Acts 2:1-4 describes how they were all filled with the Holy Spirit and began to speak in other tongues.
This event fulfilled Jesus' promise that the disciples would receive power when the Holy Spirit came upon them (Acts 1:8).
After Peter preached, about three thousand people were baptised and added to the fellowship that very day (Acts 2:41).
These new believers then devoted themselves to the apostles' teaching, fellowship, breaking of bread, and prayer (Acts 2:42).
Therefore, Pentecost is rightly regarded as the birthday of the Church and the beginning of its communal life.
The crucifixion, resurrection, and Last Supper were all essential preparatory events, but none of them marked the actual start of the Church's fellowship.
Pentecost is the only option that directly initiated the gathered community of believers in Christ.
Answer:B. Pentecost