单选题 The nurse is teaching a group of women to perform breast self-examination. The nurse should explain that the purpose of performing the examination is to discover
A. cancerous lumps.
B. areas of thickness or fullness.
C. changes from previous self-examinations.
D. fibrocystic masses.

【正确答案】 C

【答案解析】Women are instructed to examine themselves to discover changes that have occurred in the breast. Only a physician can diagnose lumps that are cancerous, areas of thickness or fullness that signal the presence of a malignancy, or masses that are fibrocystic as opposed to malignant.