What is the correct order of steps used to create a VDC federation?

What is the correct order of steps used to create a VDC federation?

1) Configure the storage pools on each ECS instance

2) Obtain the access keys for each remote ECS instance

3) Create replication groups

4) Configure the first VDC of the first ECS instance of the federation

5) Create the federation from first ECS VDC
A . 1, 2, 3, 4, 5
B . 1, 2, 4, 3, 5
C . 1, 3, 4, 2, 5
D . 1, 3, 2, 4, 5