Why is it said in the passage that the House of Lords judgment in the 1993 Bland case mudd

Why is it said in the passage that the House of Lords judgment in the 1993 Bland case muddied the waters？

A．Because the 13MA guidelines state that the final decision rests with the doctor without his having to ask another doctor for a second opinion.

B．Because the judgment did not state what should be done in the case of cancer victims who undergo unsuccessful chemotherapy.

C．Because BMA guidelines do not require doctors to seek the approval of the court when they decide to stop artificial nutrition and hydration.

D．Because the judgment requires doctors to seek court approval before withdrawing artificial nutrition and hydration from medical patients with no prospect of recovery.

请帮忙给出正确答案和分析，谢谢！