What was the biggest issue on which King Henry II and Thomas à Becket disagreed?

Just prior to his murder, Becket and Henry put aside many of their differences. The one stinging point that remained for Becket was the men of the Church who stood by the king rather than the Church. Becket felt these church men were in need of punishment and ordered what he felt was just. From what your choices look like above, I'd have to go with "who should legally judge church leaders."