I believe the answer would be C. (Along China's east coast due to the fertile soil found along the Yellow River and the Yangtzi River)
Obsessive compulsive disorder also known as OCD
Here’s South Africa
Living in a country like South Africa, there are many natural riches to inspire and create exceptional pieces of jewellery. Aside from some of the world’s most magnificent diamonds and gemstones, the flora, fauna and multi-cultural colourful nature of the country creates a true haven for artistic inspiration.
There are intellectual property laws globally that provide protection for jewellery designs which may vary according to jurisdiction including trade marks, designs, copyright, traditional knowledge and advertising laws. Below is a short note on the applicability of the trade mark law in South Africa.