You have custom Network File System (NFS) client settings for your Amazon Elastic File System (EFS). It takes up to three seconds for an Amazon Elastic Compute Cloud (EC2) instance to see a write operation performed on a file system from another Amazon EC2 instance.
Which of the following actions should you take to solve the custom NFS settings from causing delays in the write operation?
A. Unmount and remount the file system with the noac option to disable attribute caching.
B. Reduce the number of active users that have files open simultaneously on the instances.
C. Verify that the IP address of the specified mount target is valid.
D. Run the write operation from a different user ID on the same Amazon EC2 instance.
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specific reference: https://docs.aws.amazon.com/efs/latest/ug/troubleshooting-efs-general.html