Two postal delivery workers have different routes. They both travel from the post office, to neighborhoods to deliver mail, and then back to the post office. Which statement must be true postal delivery workers?

One possible statement that must be true for postal delivery workers is that they both start and end their routes at the post office.

The statement that must be true for postal delivery workers is:

- They start their routes from the post office.

To determine which statement must be true for postal delivery workers, we need to consider the nature of their routes. Let's analyze the scenario:

1. Both workers travel from the post office to neighborhoods to deliver mail.
This statement suggests that delivering mail is an essential aspect of the workers' routes. It implies that the workers' primary duty is to distribute mail to different neighborhoods.

2. Both workers return to the post office after delivering mail.
This statement implies that the workers' routes are circular, starting and ending at the post office. It suggests that the workers' routes are designed in a way that they have to return to the post office once their delivery tasks are completed.

Given these statements, the one statement that must be true for postal delivery workers is:
- Both workers have to deliver mail to neighborhoods on their routes.