What type of survey helps determine the need for rehabilitation in cities?

The correct answer is a systematic survey because this type of survey involves a structured and methodical approach to collecting data about the conditions of residential areas, public infrastructure, and the needs of communities. By systematically examining various factors such as housing conditions, public services, and safety concerns, this survey provides a comprehensive understanding of a community's requirements for rehabilitation and development.

This data is instrumental for city planners, policymakers, and code enforcement officials, as it helps in identifying specific areas of concern that may require attention or investment. The systematic nature of this survey ensures that the information gathered is reliable, making it easier to analyze trends and prioritize interventions for the betterment of the community.

In contrast, other options like community tests, pamphlets, or questionnaires might gather opinions or feedback but do not necessarily provide a thorough and objective assessment of the physical conditions and needs in the same structured manner as a systematic survey.