D both b and c are correct
Answer; C
Explanation: he Vedas are a collection of hymns and other ancient religious texts written in India between about 1500 and 1000 BCE.
This is not true! There are many other such factors.
One of them is similar to food: the availability of water.
Other is also natural disasters: tsunamis, earthquakes... they also limit population from time to time. Similarly diseases such as Aids.
The 7 principles laid out everything that needed to be exist within the government for it to function properly.
Those principles are :
Popular sovereignty, Republicanism, Federalism, Separation of powers, check and balances, Limited government, and individual rights