Developing an approximation of the monetary resources needed to complete project work is the main objective of the Estimate Costs process. Therefore, the question implies that you are conducting the Estimate Costs process and asks how this process will be affected by a large long-term multinational project. Thus, the answer choices that relate to other project management processes can be eliminated as correct responses. With the project lasting at least seven years, the impact of inflation over the course of the project must be considered. Additionally, since the project is international in scope, the project will likely be working with various currencies that will be subject to fluctuations in relative values. For large-scale projects that extend multiple years with multiple currencies, the fluctuations of currencies and inflation need to be understood and built into the Estimate Costs process. Exchange rates and inflation are considered enterprise environmental factors. Therefore, of the available choices, considering additional enterprise environmental factors is the best response.