What is the primary purpose of properly preparing the subgrade before placing interlocking concrete pavers?

What is the primary purpose of properly preparing the subgrade before placing interlocking concrete pavers?

• A. To create a stable, well-drained foundation that minimizes settlement and provides a uniform base for the base course and pavers.
• B. To improve surface color uniformity of the pavers.
• C. To reduce the need for edge restraints.
• D. To eliminate the need for bedding sand.

Answer: (A)