Which procedure for backing up a relational database on EC2 that is using a set of RAIDed EBS volumes for storage minimizes the time during which the database cannot be written to and results in a consistent backup?

Which procedure for backing up a relational database on EC2 that is using a set of RAIDed EBS volumes for storage minimizes the time during which the database cannot be written to and results in a consistent backup?
A . 1. Detach EBS volumes, 2. Start EBS snapshot of volumes, 3. Re-attach EBS volumes
B . 1. Stop the EC2 Instance. 2. Snapshot the EBS volumes
C . 1. Suspend disk 1/0, 2. Create an image of the EC2 Instance, 3. Resume disk 1/0
D . 1. Suspend disk 1/0, 2. Start EBS snapshot of volumes, 3. Resume disk 1/0
E . 1. Suspend disk 1/0, 2. Start EBS snapshot of volumes, 3. Wait for snapshots to complete, 4. Resume disk 1/0

Answer: A

Explanation:

Reference: http://media.amazonwebservices.com/AWS_Storage_Options.pdf (page 11)