The most appropriate estimates for the height of each vehicle would be:
A. Four-door car: 58 inches Fire engine: 129 inches
Typically, a standard four-door sedan is around 55 to 60 inches in height, and fire engines can range significantly in height, but they are generally between 100 to 130 inches tall or more, depending on the specific type and design. Thus, option A provides reasonable estimates for both vehicles.