A large engineering firm has uploaded all its project documents to Amazon S3 Glacier. This 1 PB data needs to be audited by a team of auditors as a part of an annual IT audit. You have been assigned a task to provide this data to auditors who plan to start working in one week.
Which of the following steps can be used to retrieve this data at the lowest cost?

Answer options:

A.Initiate an archive retrieval job specifying archive ID & using the Standard retrieval option.
B.Initiate an archive retrieval job specifying archive ID & using the Bulk retrieval option.
C.Initiate an archive retrieval job specifying Job ID & using the Bulk retrieval option.
D.Initiate an archive retrieval job specifying Job ID & using the Standard retrieval option.

Correct Answer –B
 To initiate an archive retrieval job, an archive ID is required which can be found from vault inventory. Also, one of the below 3 retrieval options can be specified.
1)Expedited - For quick retrieval of data, typically in 1-5 minutes.
2)Standard – Default retrieval option, data is retrieved in 3-5 hours.
3)Bulk – With this retrieval option, retrieval is completed in 5-12 hours for a large amount of data & has the lowest cost.
 In the above case, since data is required in one week, the Bulk retrieval option can be used to save cost.
Option A is incorrect as since a large amount of data is to be retrieved & the client is looking for the lowest cost. The bulk retrieval option is a better choice than the Standard retrieval option.
Options C & D are incorrect as Job ID is returned by S3 Glacier post retrieval job is initiated, & Archive ID is required to initiate archive retrieval job.
For more information on retrieving data in Amazon S3 Glacier, refer to the following URL-
https://docs.aws.amazon.com/amazonglacier/latest/dev/downloading-an-archive-two-steps.html