Question

Which resulted from China’s isolation from the rest of the world?

Answer 1

For the answer to the question above asking which resulted from China’s isolation from the rest of the world? 
China did not keep up with the technological advances that were sweeping Europe.
So the answer is B. Development in China fell behind Europe. 

Answer 2

The correct answer is B. The result of China's isolation from the rest of the world was that development in this country fell behind Europe.

In fact, by the mid 1800s, China was a poor, undeveloped country. Famines were common, and the peasant population was in a state of stagnation. The general social growth was very difficult, since the country did not have a developed industry.

The current development of the country (which has the second highest nominal GDP in the world, not its GDP per capita, which is ranked 100 in the ranking) is due more to the huge Chinese population than to a policy of cultural exchange and commercial with the rest of the world, since it is widely known that the Chinese Communist Party even today maintains policies of commercial isolation.