Concept:Paul's instruction to the Thessalonian believers concerned separation from church members who refused to work and lived disorderly lives.
Explanation:In his second letter to the Thessalonians, Paul addressed a specific problem in the church: some believers had stopped working and were living idle, undisciplined lives.
He gave a clear command in the name of the Lord Jesus Christ that Christians should withdraw from any brother who walked in idleness and did not follow the teaching they had received.
This instruction was not about stinginess, general sinfulness, or failing to preach the Gospel, but about a deliberate refusal to work and a disruptive, lazy lifestyle.
Paul later reinforced this by his own example, working night and day so as not to be a burden, and he added the rule: "If anyone will not work, let him not eat."
The phrase "keep away from any brother" points directly to church discipline for those who were idle and busybodies, not merely those who were ungenerous or struggling with sin.
Therefore, the behaviour Paul commanded the Thessalonians to avoid was specifically living in idleness.
Answer:B. living in idleness