Critical Reasoning

Is it B?

C will be the answer as it clearly asserts the reason why import protection is difficult to get and only an attached security or defense issue will be able to help machine-tool indusrty to get the import protection.

B cannot be an answer as if the fact mentioned in B would be true, machine tool industry would not file petition for import protection as security issue. Rather this petition would be filed separately without the security thing brought into.

IMO: C.

What is the OA?

Thanks.