Answer:
B. the Lord's half brother.
Step-by-step explanation:
There´s no absolute certainty about the real author of the Epistle of James. The document doesn´t show traits of pseudepigraphic, so many scholars believe it was written by James, the Lord´s brother. There are no autobiographic elements in it, it doesn´t suggest a reason for hidding the identity . There is scholarly agreement that the author was a Jew.