The fоllоwing cаtegоries аre used by some reseаrchers to categorize zip codes as urban, suburban, or rural based on population density. An urban zip code is a zip code with more than 3,000 people per square mile. A suburban zip code is a zip code with between 1,000 and 3,000 people, inclusive, per square mile. A rural zip code is a zip code with fewer than 1,000 people per square mile. Consider the following method, which is intended to categorize a zip code as urban, suburban, or rural based on the population density of the area included in the zip code. public static String getCategory(int density) { /* missing code */ } Which of the following code segments can replace /* missing code */ so the getCategory method works as intended? I. String cat; if (density > 3000){ cat = "urban"; } else if (density > 999){ cat = "suburban";} else{cat = "rural"; } return cat; II. String cat; if (density > 3000){ cat = "urban"; } if (density > 999) { cat = "suburban"; } cat = "rural"; return cat; III. if (density > 3000){ return "urban"; } if (density > 999) { return "suburban"; } return "rural";