Answer:
D. by focusing on the availability of natural resources to support new technology
Step-by-step explanation:
President Reagan can support the argument that Soviet students have reason to be positive about the future by focusing on the availability of natural resources in their country to support new technology. A country with abundance of natural resource have a reason to be positive because the raw materials needed in supporting new technology would be readily available at the country, therefore the country would develop both technologically and economically.