40 貿易契約中約定〝This contract is governed by the laws of the Republic of China.〞，則下列敘述何者正確？ (A)此項條款為貿易契約成立與生效之必要條款 (B)此項條款常出現在國內買賣的契約中 (C)此項條款為索賠條款(claim clause) (D)此項條款為準據法條款(proper law clause)