Final answer:
According to the given information, a significant percentage of homes were not rebuilt after urban renewal, resulting in a shortage of new housing. the correct answer to the question is D. 80%.
Step-by-step explanation:
Urban renewal was a program aimed at clearing slums and revitalizing urban areas. However, according to the provided information, the new homes were not built in the cleared lots. Instead, parking lots, highways, parks, factories, and shopping centers were constructed.
Therefore, based on the information given, it can be inferred that a significant percentage of homes were not rebuilt after urban renewal, resulting in a huge shortage of new housing. So, the correct answer to the question is D. 80%.