Answer:
A) the United Nations Convention on Contracts for the International Sale of Goods.
Explanation:
From the question we are informed about Toro, S.A., which is based in Mexico, enters into a contract for the purchase of portable livestock fencing from United Fencing Company, which is based in the United States. In this case, This contract is governed by the United Nations Convention on Contracts for the International Sale of Goods. The United Nations Convention on Contracts for the International Sale of Goods can as well be regarded as
"Vienna Convention" this body is a
a multilateral treaty which was set up to bring about uniform framework as well as international commerce is concerned.
