投资者减持股份使上市公司外资股比例低于（），且该投资者非为单一最大股东，上市公司应在10日内向审批机关备案并办理注销外商投资企业批准证书的相关手续。

A.10%

B.20%

C.25%

D.30%

In relation to the basic legal system of China:

(b) Article 428 of the Contract Law of China provides that upon the implementation of this law, the previous contract laws shall be simultaneously abolished. Based on this provision, the Supreme People’s Court has issued a Judicial Interpretation on the Application of the Contract Law.In relation to this Judicial Interpretation, state the rule of the applicable law to deal with a contractual dispute brought to the people’s court after the date of implementation of the Contract Law but the contract was concluded before that date. (4 marks)