You have three AWS accounts (A, B & C) which share data. In an attempt to maximize performance between the accounts, you deploy the instances owned by these three accounts in 'eu-west-1b'. During testing, you find inconsistent results in transfer latency between the instances. Transfer between accounts A and B is excellent, but transfers between accounts B and C, and C and A, are slower. What could be the problem ?
A) You have accidentally set up account C in "us-west-1b".
B) The names of the AZs are randomly applied, so "eu-west-1b" is not necessarily the same physical location for all three accounts.
C) The instances for Account C are on an overloaded Host. Stop all the Account C instances and then start them together so that they run an a new host.
D) Account C has been allocated to an older section of the Data Hall with slower networking.
E) You have incorrectly configured the cross-account authentication policies in Account C, adding latency to those instances.