Final answer:
Progressive rate springs provide a softer ride when the vehicle is lightly loaded. Coil springs are used on the front suspensions of most modern vehicles.
Step-by-step explanation:
In response to technician A, progressive rate springs actually provide a softer ride when the vehicle is lightly loaded. This is because the springs are designed to provide more resistance as the load increases, resulting in a smoother ride for lighter loads.
Technician B is correct in stating that coil springs, also known as helical springs, are used on the front suspensions of most modern vehicles. This type of spring is commonly used due to its ability to absorb shocks and provide better stability and control.
Therefore, the correct statement is: Technician B is correct, while Technician A is incorrect.