The nurse is teaching breast self-examination (BSE) to a college student. The nurse knows that the client understands the best time to examine her breasts when she says:

A. "I’ll examine my breasts 1 week after my period starts. "
B. "I’ll perform a BSE just before my period starts. "
C. "I must examine my breasts the same time each day. "
D. "Every time I shower I’ll do a breast examination. "

简述财产所有权的概念和取得方式。