Which of the following statements is most correct concerning a member’s obligation to his or her employer under the Code and Standards（）

A. Consent from the employer is necessary to permit independent practice that could result in compensation or other benefits in competition with the member’s employer.

B. Members are prohibited from making arrangements or preparations to go into competitive business before terminating their relationship with their employer.

C. Members are prohibited from undertaking independent practice in competition with their employer.

女性，50岁，上腹痛3个月余，2个月前钡透为胃窦后壁溃疡，经抗溃疡药物治疗8周后疼痛曾一过性缓解，进一步处理应首选（）

A.反复查便隐血试验

B.继续药物治疗

C.钡餐检查

D.胃镜检查

E.手术治疗