Pavement design for highways involves both flexible and rigid pavements. Which of the following best describes the difference between these two types of pavements in terms of load distribution and structural behavior?

A$.$ Flexible pavements distribute loads primarily through bending, while rigid pavements distribute loads through shear and compression.

B$.$ Flexible pavements rely on the subgrade for support, while rigid pavements distribute loads evenly over a larger area.

C$.$ Flexible pavements have a higher initial cost but longer service life compared to rigid pavements.

D$.$ Rigid pavements require thicker layers of asphalt, while flexible pavements use reinforced concrete for strength.