单项选择题
Liquorice Consists of the dried,unpeded roots and stolns,and contains not less than 4．0% of glycyrrhizinic acid．Which of the following is true（）
A．除去外皮的根 B．除去外皮的根茎 C．潮湿的根茎 D．不少于4．0%的甘草酸 E．低于4．0%的甘草酸
A．药品杂质不得多于3% B．药品中长度多于5mm的茎不得多于3% C．药品中根茎量不得多于3% D．药品中直径超过5mm的茎不得多于3% E．药品中茎量不得多于3%