Problem: A breast cancer patient had a tumor removed from the right breast. The surgeon also removed some axillary lymph nodes that were neighboring the tumor. A month later, the patient noticed that their right arm was swollen. What is the most likely reason of the arm swelling? a. Swelling due to the immediate effects from surgery b. An accumulation of leukocytes c. An accumulation of fluid, known as edema d. A reaction to medication