You have identified network throughput as a bottleneck on your m1.small EC2 instance when uploading data Into Amazon S3 In the same region.
How do you remedy this situation?

A. Add an additional ENI

B. Change to a larger Instance

C. Use DirectConnect between EC2 and S3
D. Use EBS PIOPS on the local volume

Explanation:
https://media.amazonwebservices.com/AWS_Amazon_EMR_Best_Practices.pdf