Michel Marchant, CFA, recently became an independent money manager. After six months, he has only ten clients, who are family and friends. To supplement his income, Marchant accepted part-time employment as an advisor at Middleton Financial Advisors. According to CFA Institute Standards of Professional Conduct, which of the following statements about Marchant’s duty to his new employer is TRUE（）.

A. Marchant must inform Middleton about his existing clients but need not inform his existing clients about his new part-time employment with Middleton. 

B. Marchant must inform Middleton to keep his existing clients and must inform his existing clients of his new part-time employment at Middleton. 

C. Marchant need not inform Middleton about his existing clients but must inform his existing clients about his new part-time employment at Middleton.

全量备份的缺点是恢复时必须依赖上一次全量备份和本次的差异备份才能完整的恢复数据。