Answer: A) to establish the hierarchy of power within Gloucester's family
Step-by-step explanation:
In this passage, Gloucester is describing Edmund's relationship to his family, stating that Edmund is a "horeson" or illegitimate child in the family born out of adultery.
The use of the word horeson creates obvious distance between Edmund and Gloucester's family, even if not intentionally; Edmund will never be acknowledged as a full member of the family due to his 'illegitimacy', so the use of the word horseon clearly established this boundary within the hierarchy of familial power.