Subdivision regulations govern the division of land into lots for development, focusing on the layout and infrastructure of the subdivision. This includes the design of streets (e.g., width, alignment) and the location of utilities (e.g., water, sewer lines), as in option B. The APA’sAICP Certification Exam Content Outline(2022), under “Plan and Policy Development,” states, “Subdivision regulations primarily address the design and layout of streets, lots, and utilities to ensure orderly development.” Option A (building materials and construction) is typically regulated by building codes, not subdivision regulations. Option C (type of activities) pertains to zoning, which controls land use. Option D (height and bulk) is also a zoning matter, not subdivision regulation. TheCPC Study Manual(2024) confirms, “Subdivision regulations ensure proper street design and utility placement to support development,” supporting option B.