Concept:A gateway city is defined by its strategic location as a link between countries or regions, not by controlling entry/exit rights or by being a port with colonial history.Explanation:Statement 1 is correct because a gateway city's physical location makes it a link between one country and others, or between one region and another.Statement 2 is incorrect because a gateway city does not necessarily exercise control over a large area by commanding entry and exit rights and powers; that description is too broad.Statement 3 is incorrect because not all gateway cities are ports, and not all were former administrative centres for colonial government. The definition focuses on its linking function, not its port status or colonial past.Answer:A. 1 only