The client is advised by the physician to have mammography screening annually. Which of the following is the best measure to improve adherence with mammography screening

A．Making sure that the individual barriers to screening are minimized.

B．Emphasizing that mammography screening can prevent breast cancer.

C．Emphasizing that mammography screening is a low-cost approach to cancer prevention.

D．Informing the client that she is at high risk for breast cancer and needs to follow the physician's recommendation.

番茄的圆果与长果是一对相对性状（设基因型为B或b），下表是番茄的果形四个组合的遗传实验结果，分析回答有关问题：

四个组合中属于测交的是（）组合。