问题详情

The second sentence in Para. 5 implies

A．hypertension is hard to detect.

B．children often refuse to have their blood pressure tested

C．you"ll have to pay a lot of money if you want to have your child"s blood pressure checked in a grocery.

D．in a local grocery, you are free to determine how to have your child"s blood pressure examined.

请帮忙给出正确答案和分析，谢谢！