When designing a bridge in a seismic$-$prone area, what is a key consideration for ensuring seismic resistance?

A$)$ Using deep foundations like piles or drilled shafts to withstand lateral loads.

B$)$ Prioritizing lightweight materials to reduce seismic forces.

C$)$ Incorporating flexibility into the structural system to dissipate seismic energy.

D$)$ Increasing stiffness to resist seismic forces.