You are building a content serving web application (size not exceeding 25 GB) on 5 EC2 load-balanced instances. You have chosen EFS for content storage. The content is accessed frequently by a large number of users. Which of the following throughput mode would you choose to ensure that application on EC2 instances transfers the data to EFS without any performance bottleneck?

Answer options:

A.Throughput mode = Bursting, provides a consistent high throughput for smaller data sizes.
B.General Purpose Performance Mode
C.Throughput mode = Provisioned, you can configure specific throughput irrespective of EFS data size.
D.Max I/O Performance Mode

Answer: C
Specifying Throughput with Provisioned Mode
"Provisioned Throughput mode is available for applications with high throughput to storage (MiB/s per TiB) ratios, or with requirements greater than those allowed by the Bursting Throughput mode. For example, say, you`re using Amazon EFS for development tools, web serving, or content management applications where the amount of data in your file system is low relative to throughput demands. Your file system can now get the high levels of throughput your applications require without having to pay your file system".
https://docs.aws.amazon.com/efs/latest/ug/performance.html#throughput-modes
Please refer to page 87, section "Specifying Throughput with Provisioned Mode" in the below link
 https://docs.aws.amazon.com/efs/latest/ug/efs-ug.pdf
For this case, since the data is low compared to the throughput demand, provisioned mode is the right choice for throughput mode.
Since the question asks for a "throughout mode," the "performance mode" cannot be used here. Therefore Options B and D are INCORRECT here.