When you first log in to a router, how does the router indicate that factory defaults are being used? Junos Configuration Basics

When you first log in to a router, how does the router indicate that factory defaults are being used? Junos Configuration Basics

A. The router's host name is Amnesiac. B. The password you used to log in is junos. C. The router immediately enters configuration mode after you log in. D. The router allows you to enter configuration mode without logging in.