Final answer:
Without the actual population numbers and exact areas of Hightown and Mightown, we cannot determine which town has the greater population density. The correct answer is 'Insufficient information'.
Step-by-step explanation:
To determine which town has the greater population density, we would need to know both the population of each town and the area of each town. Population density is calculated by dividing the population by the area. The question only provides information about the relative size of the towns' areas, not the actual populations or the exact areas.
Since we do not have the number of people living in Hightown or Mightown, nor do we have their exact areas, we cannot calculate the population density for either town. Therefore, we cannot say which town has a greater population density without additional information.
The correct answer is d. Insufficient information.