对于执行edu_class变量数据编码和缺失值填充的代码，以下哪个Python代码片段不能正确实现所提供的操作？
A. data_raw'gender' = data_raw'gender'.replace({'Male': 1, 'Female': 0})
B. data_raw'edu_class' = data_raw'edu_class'.map(lambda x: label.index(x) if x in label else len(label))
C. data_raw'edu_class' = data_raw'edu_class'.apply(lambda x: label.index(x) if pd.notnull(x) else len(label))
D. data_raw'edu_class' = data_raw'edu_class'.apply(lambda x: label.index(x) if x in label else -1)
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