Answer:
b. owed their lord labor services.
Explanation:
"The Huna People, also known as Huns, invaded Gupta territory and caused significant damage to the empire. The Gupta Empire ended in 550 CE, when it disintegrated into regional kingdoms after a series of weak rulers and invasions from the east, west, and north."
The correct answer is C. A decrease in hydropower development.
The Yangtze River is one of the longest rivers by volume in all the world. And it has become the river which flows entirely in the country. What makes this river to have less pollution is the fact that there are some parts that are protected as nature reserves.
