The correct answer is C) isolation from other early civilizations.
A result of the physical geography of ancient China was the isolation from other early civilizations.
Ancient Chine lived thousands or years due to isolation. Geography, physical barriers, helped China to isolated from the external world and this had positive consequences such as they avoid invasions from armies of other nations but they could not trade and benefit from commerce with other states.
China has important physical barriers such as the Gobi Desert, the Himalayas, the Yellow Sea, Taklamakan Desert, Mount Everest, and the Jungles of Burma.