Answer: D - A remote tracer decreases the turnaround time for jobs from the lab, allows you to store the exact measurements on a computer, and increases the accuracy of those measurements.
Remote tracers are digital devices that trace the lens, noting the circumference. You need to manually put in the frame size for the lab and send it all directly to the lab. The lab can start the job before receiving a frame. Additionally, you can use the tracer to make lens only jobs more accurate and faster by tracing the inside of the frame being used.