great / increase / population / hard / find / housing

• A. The greater of increase in population, the harder it is to find adequate housing.
• B. The greater is the increase in population, the harder it is for people to find adequate housing.
• C. The greater the increase in population is, the harder it is for people to find adequate housing.
• D. The greater is of the increase in population, the harder it is to find adequate housing.