Question: Assume that a classification model is built using logistic regression to obtain the accuracy of training samples and test samples. Then, add a new feature

Assume that a classification model is built using logistic regression to obtain the accuracy of training samples and test samples. Then, add a new feature to the data, keep other features unchanged, and train the model again. Which of the following statements is true?
A. The accuracy of training samples remains unchanged or increases.
B. The accuracy of training samples will definitely decrease.
C. The accuracy of test samples will definitely decrease.
D. The accuracy of test samples remains unchanged or increases.

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