把各宝藏的相关信息保存在下面的字典result中：result={‘宝藏数’: 7,‘宝藏列表’: [{‘宝藏名称’: ‘宝藏1’,’所在城堡’: ‘修加特’, ‘坐标’:{‘x’: 20, ‘y’: 500}, ‘收入’:800},{‘宝藏名称’: ‘宝藏2’,’所在城堡’: ‘卢云’, ‘坐标’:{‘x’: -20, ‘y’: 260}, ‘收入’:1200},{‘宝藏名称’: ‘宝藏3’,’所在城堡’: ‘古鲁丁’, ‘坐标’:{‘x’:-150, ‘y’:-50}, ‘收入’:2000},{‘宝藏名称’: ‘宝藏4’,’所在城堡’: ‘狄恩’, ‘坐标’:{‘x’:-50, ‘y’:-400}, ‘收入’:300},{‘宝藏名称’: ‘宝藏5’,’所在城堡’: ‘高达德’, ‘坐标’:{‘x’:100, ‘y’:300}, ‘收入’: 500},{‘宝藏名称’: ‘宝藏6’,’所在城堡’: ‘亚丁’, ‘坐标’:{‘x’:150, ‘y’:120}, ‘收入’: 1000},{‘宝藏名称’: ‘宝藏7’,’所在城堡’: ‘奇岩’, ‘坐标’:{‘x’:-100, ‘y’:-100}, ‘收入’:600},] }如果要输出宝藏4所在的城堡的x坐标，可以用下面哪个语句实现:

A. print(result('宝藏列表')[4]('坐标')('x'))
B. print(result['宝藏列表'][4]['坐标']['x'])
C. print(result('宝藏列表')[3]('坐标')('x'))
D. print(result['宝藏列表'][3]['坐标']['x'])