Considering the historical context and authorship, what is the primary purpose of the book of Jude, and how does it address the specific challenges faced by the early church?

A To provide a detailed account of the life and teachings of Jesus, supplementing the information found in the Gospels. 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 sound doctrine. C To offer practical guidance on church leadership and administration, outlining the qualifications and responsibilities of elders and deacons. D To encourage believers to embrace social justice and advocate for the rights of the marginalized and oppressed, challenging the political and economic structures of the Roman Empire.