You require the ability to analyze a large amount of data, which is stored on Amazon S3 using Amazon Elastic Map Reduce. You are using the cc2 8x large Instance type, whose CPUs are mostly idle during processing. Which of the below would be the most cost efficient way to reduce the runtime of the job?
A. Create more smaller flies on Amazon S3.
B. Add additional cc2 8x large instances by introducing a task group.
C. Use smaller instances that have higher aggregate I/O performance.
D. Create fewer, larger files on Amazon S3.
Answer: C. Use smaller instances that have higher aggregate I/O performance.
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The Word feature that automatically creates backup versions of the current document is called ________
Fill in the blank(s) with correct word