c不正确的原因没看懂

问题如下：

选项：

A.cabotage.

B.armed conflict.

C.nationalization of key export industries.

解释：

A is correct. Cabotage is the right to transport passengers or goods within a country by a foreign firm. Many countries—including those with multilateral trade agreements—impose restrictions on cabotage across transportation subsectors, meaning that shippers, airlines, and truck drivers are not allowed to transport goods and services within another country’s borders. Allowing cabotage requires coordination on areas like physical security and economic coordination, a highly multilateral (multifaceted tool) process. B is incorrect because armed conflict is the most extreme example of a national security tool. It can be either internal or external to a country in taking a direct and active approach to wielding influence. C is incorrect because nationalization of key export industries is an economic tool. This process of transferring an activity or industry from private to state control is a non-cooperative approach to asserting economic control.

A正确。沿海运输是指外国公司在一国境内运输旅客或货物的权利。许多国家，包括那些有多边贸易协定的国家，对运输子部门的运输实行限制，这意味着托运人、航空公司和卡车司机不允许在另一个国家境内运输货物和服务。允许沿海运输需要在人身安全和经济协调等领域进行协调，这是一个高度多边的过程。

B是不正确的，因为武装冲突是国家安全工具的最极端例子。它可以是一个国家内部的，也可以是外部的，以直接和积极的方式施加影响。

C是不正确的，因为关键出口产业的国有化是一种经济工具。这类将一项活动或产业从私人转移到国家控制的过程是一种主张经济控制的非合作方式。