A New Employee,Alice,has Been Hired to Work at a Branch

Multiple Choice

A new employee,Alice,has been hired to work at a branch office configured with a RODC.This RODC connects to a DC over a WAN link back at the head office.Just as Alice is about to log onto her machine for the first time,she finds that she is unable to authenticate despite using the correct user name and password given to her.
Other users in the branch office can log in fine,but Alice cannot.What is most likely the issue?

A) Alice's user and password information hasn't replicated to the RODC yet,and therefore her credentials can't be verified by the RODC server
B) Alice has been added at the head office domain,but not the branch office domain
C) The WAN link failed before Alice could log on,preventing her from making use of credential caching.
D) The RODC has different account password information than the information stored at the head office,causing a conflict