Final answer:
Not all starters require shims. Shims are used to adjust the position of the starter. Measurements are required to determine the need for shims on certain vehicles.
Step-by-step explanation:
In the context of installing a starter in a vehicle, both statements A and B are incorrect.
While it is true that some starters may require shims for proper installation, not all starters do. Shims are used to adjust the position of the starter in relation to the flywheel or flexplate, ensuring proper engagement.
Measurements need to be taken to determine the need for shims on certain vehicles. It depends on the specific make and model of the vehicle to determine if shims are necessary or not.