Which of the Following Is an Example of a Product

Which of the following is an example of a product and testing standards nontariff barrier?

A) Malaysia's requirement that during prime time at least 40 percent of the songs on the radio be by local artists
B) Turkmenistan's policy that certification of imported electrical equipment be performed by local laboratories
C) China's policy that imported sugar be distributed only by state-owned enterprises
D) Canada's requirement that organic baby food be manufactured locally