Final answer:
The Zio AT application video reviews the step of keeping the Gateway within 10 feet. This distance ensures the device communicates effectively with the application and is analogous to estimating a safe distance in car-lengths before crossing a road.
Step-by-step explanation:
After watching the Zio AT application video, it is important to adhere to the specific step of keeping the Gateway within a certain distance. Among the given choices, keeping the Gateway within 10 feet is the correct step they review. It is crucial for the device's proper functionality that the Gateway remains nearby within this distance to ensure it can communicate effectively with the Zio AT application.
Relating this to car safety as a real-world example, considering how far away a car should be before it's safe to cross a road can be analogous to understanding this requirement. Just as you would estimate a safe distance in car-lengths to ensure your safety before crossing, you need to maintain a set proximity to the Gateway for the application's optimal performance.