Answer with its Explanation:
Every firm has to follow the rules and regulation of the country in which it is operating which includes the must comply rules, ethical standards and other requirements as per the stock exchange rules. Furthermore, though their might be plenty of similarities in domestic and foreign market but the companies will have to conduct their operations in-accordance with the rules and regulations of the country in which it resides.
No doubt, a firm is responsible for its activities of supply chain but to some limits which is defined by the control. If the company possess the control of a certain operation then the company is responsible for its controlling and vice versa. So one thing is clear that the company is responsible but to some extent.
Now the activities for which the firm is responsible includes the matters that are controlled within their firm which includes production, selling and distribution, etc. Now the operations that are not controlled by the firm includes the operations of the supplier's supply chain. Possibility exists that the firm will have influence upon the supplier's supply chain operations but the influence further weakens when we talk about the supplier's supplier.
Because the firm can not control or has little control over the operations of the suppliers hence this is point where the responsibility of the supply chain management ends.