Interior regions is the area of China has not benefited from the establishment of Special Economic Zones
Option B
Step-by-step explanation:
There are certain factors that helps a particular area to gain benefit in terms of trade and location of area highly influence as the benefit that can be derived from the area that is why Shenzhen has been proved to be amongst most successful special economic zone due to its richness in resources being located near Hong-Kong and it's ports. And considering the options, it's quite obvious that SEZ will be best in port and coastal regions, as it is easier to trade from the mentioned areas.