Which service or feature provides the fastest method of getting the data into Amazon Glacier?

You are working with a customer who has 10 TB of archival data that they want to migrate to Amazon Glacier. The customer has a 1-Mbps connection to the Internet.

Which service or feature provides the fastest method of getting the data into Amazon Glacier?
A . Amazon Glacier multipart upload
B . AWS Storage Gateway
C . VM Import/Export
D . AWS Import/Export

Answer: A

Explanation:

http://docs.aws.amazon.com/amazonglacier/latest/dev/uploading-archive-mpu.html