After a mastectomy of her left breast, a woman experiences edema in her left arm. What is the probable cause?
A. The blood that would have circulated through her left breast is now trapped in her left arm.
B. In addition to having cancer in her left breast, she likely has cancer in her left arm as well.
C. The surgeon likely removed her left axillary lymph nodes as well.
D. She was likely lying on her left side during surgery, causing inflammation in her left arm.
Answer: C
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