Critical Reasoning (CR) | Re: While the ivory trade has been banned in most developed nations

While the ivory trade has been banned in most developed nations, in newly-developed countries ivory is prized as a signal of wealth. In particular, there is great demand for complete elephant tusks - items that have spawned a counterfeit industry in which replicas of complete tusks are mass-produced and sold as real ivory. Buyers should beware, however, of tusks that have no imperfections as these are almost certainly counterfeits.

Which of the following most strengthens the argument above?

A.