Answer:
Both technician A and is correct.
Step-by-step explanation:
Because first one says that the user can be set the diameter of the drum gauge and then, it lock in place when the brake for the following pre-adjustment gauge. After the first one, the second one says that the user can place that following pre-adjustment gauge in the middle of the shoe brake at that time when they processing the adjustment brake. So, both are saying true about the pre-adjustment gauge process.