Crumple zones work ______ body rigidity in reducing the force of impact?

• A. With
• B. Together with
• C. Along with
• D. In conjunction with

Answer: (B)

The concept here is how protective car design components cooperate to reduce impact force. Crumple zones are meant to deform on impact to absorb energy, while the passenger compartment remains relatively rigid to protect occupants. Saying they work together with body rigidity captures this joint action: the crumple zones dissipate energy and lengthen the stopping distance, and the rigid passenger cell keeps occupants safer. Other phrases imply a simpler coexistence or are more formal, but they don’t convey this cooperative functioning as clearly.