Which of the following is a detailed list of the IP address ranges assigned to and used by AWS

Answer options:

A.ip-ranges.json
B.aws.json
C.aws-vpc.json
D.There is no list. You need to contact AWS support for this.

Answer - A
The AWS Documentation mentions the following
Amazon Web Services (AWS) publishes its current IP address ranges in JSON format. To view the current ranges, download the .json file. To maintain history, save successive versions of the .json file on your system. To determine whether there have been changes since the last time that you saved the file, check the publication time in the current file and compare it to the publication time in the last file that you saved.
For more information on AWS reserved IP ranges, please refer to below URL:
http://docs.aws.amazon.com/general/latest/gr/aws-ip-ranges.html