Read the passage carefully and give the answer of question. One of the most serious problems confronting our country is that of a fast-growing population . In fact it is at the root of many other problems. At the moment, thanks to planning, we are able to produce food and cloth sufficient for our people and even in some excess. But if the population continues to grow at this rate, it will not be long before the surplus turns into a bare minimum and even a deficit. The position in regard to accommodation is even now. Far form satisfactory in spite of our efforts.
"It is at the root of many other problems" means that

Options

A. it is found along with many other problems
B. it is caused by many other problems
C. it gives rise to many other problems
D. it is buried under many other problems