Which of the following is an appropriate health promotion activity to reduce the incidence of osteoporosis

A．Teaching women to maintain adequate calcium intake.

B．Teaching women how to administer pain medication safely.

C．Avoiding estrogen replacement therapy when postmenopausal.

D．Teaching women to increase caffeine intake as a preventive measure.

请看录像，找出录像中秘书行为及工作环境中的至少处正确或错误的地方。