What is the primary purpose of the book of Jude, and how does it address the specific challenges faced by the early Christian community it was written to?

A To provide a detailed genealogy of Jesus's lineage, emphasizing his rightful claim to the throne of David and refuting false messianic claims. B To warn against the infiltration of false teachers who were distorting the gospel message and promoting licentious behavior, urging believers to contend for the faith and remain steadfast in truth. C To offer practical guidance on church administration and leadership, outlining the qualifications for elders and deacons and providing instructions for resolving conflicts within the congregation. D To recount the miraculous events of Jesus's ministry, providing eyewitness accounts that corroborate the other Gospels and strengthen the faith of believers.