The answer is just general scarcity : limited amount of water
Alrighty, I don't know what point C is but I do know what opportunity cost is and will attempt to give you some more insight into the question. Opportunity cost is a trade off. It's what you give up in order to obtain something else. For example, you would pay more in order to have a car with more safety features. A higher price for the consumers in exchange for more safety.
Answer:
Rom was able to gain its empire in large part by extending some form of citizenship to many of the people it conquered. Military expansion drove economic development, bringing enslaved people and loot back to Rome, which in turn transformed the city of Rome and Roman culture
To legitimize his claim to rule chiana as emperor through divine sanction
The correct answer to this open question is the following.
Although there are no options attached we can say the following.
The Gupta administration was similar to the present-day administrative system in India in that both established a central form of government, developed a bureaucratic administrative system, and both have a powerful military system to control such as a large territorial extension.
The Gupta Empire was founded by Sri Gupta. This ancient Indian empire had its brightest moment during the Golden Age of India, because at that time Indian people made important discoveries in mathematics, art, literature, engineering, philosophy, and astronomy.