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单选题
Recommendations for ATC holding operation in icing conditions for up to 45 minutes shall provided.
A
A.应提供结冰条件下最多保持空中等待程序运行45分钟的建议。
B
B.建议在结冰条件下保持空中交通管制运行45分钟。
C
C.应提供在结冰条件下ATC保持运行长达45分钟的建议。
答案解析
正确答案：B
解析：
题干中提到了在结冰条件下的ATC保持操作，应该提供最多保持空中等待程序运行45分钟的建议。因此正确答案是B。
相关知识点：
结冰条件下ATC保持运行口诀
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