单项选择题

Which statement is true according to the passage

A．Mastectomy used to be considered the only safe course.
B．The chances of survival after a mastectomy are greater than after lumpectomy.
C．Mastectomy can decrease the patients' chances of a care.
D．Most women prefer lumpectomy.

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单项选择题Which statement does not agree with the text

A．Mastectomy is the only reasonable choice for a woman with small breast and a large tumor.
B．Life-style and attitudes also play a role in the choice.
C．Many women make an improper decision in the treatment out of fear and lack of information.
D．Women are more likely to feel tired if they accept mastectomy.

单项选择题Which statement do the researchers think is wrong

A．They know how a tumor is developed.
B．They know how a new tumor is seeded in the body.
C．They know how the female hormone estrogen makes breast cancer cells grow.
D．They know breast cancer is a death sentence to women.