Final answer:
An international manager primarily considers the size of the economy of a potential host country, along with the country's economic system, political stability, environmental laws, import dependencies, and business regulatory framework when deciding where to establish a business presence.
Step-by-step explanation:
When an international manager is considering where to do business, one of the first considerations should be E. the size of the economy. This factor is crucial as it influences market potential, availability of resources (including labor), and the level of consumer demand. Additionally, an analysis of the country's economic system, political stability, environmental laws, dependency on imports like oil, and the country's approach to business regulation are also significant when deciding to enter a foreign market. The internal stability of a country, its capacity to engage in foreign policy and diplomacy, and how these factors affect broader concerns such as environmental policy are vital considerations for an international manager. Furthermore, the presence of manufacturing is another consideration, but it is not exclusive or necessarily the primary one.