The correct answer is A) Isolation allowed China to develop on its own, without too much interference from foreign invasion.
China's isolated geography contributed to its development as a country in that Isolation allowed China to develop on its own, without too much interference from foreign invasion.
China is located in a territory that has many geographical barriers. For instance, the Yellow Sea, the Himalayas, Gobi Desert, Mount Everest, Taklamakan Desert, The Pacific Ocean, and the Jungles of Burma. China had no many visitors during this isolationist period. This allowed China to establish its own rhythm of development without external influences.