Answer:
C. Access to more building supplies
D. Access to medical supplies
Explanation:
The population that is described is obviously living a way of life that has been practiced until several hundred years ago. Using the river with its water and fertile deposits as the main source for production of food and water, but facing overpopulation and lack of medical supplies. In order for the most immediate needs to be satisfied, this population needs more building supplies, so that the overpopulation is resolved. Also, extremely important for lowering the death rates and improving the quality and length of life, access to medical supplies are a must, which will help this population to be much more healthy and to have much less deaths because of diseases.
