C is correct. AWS has the concept of a Region, which is a physical location around the world where we cluster data centers.

We call each group of logical data centers an Availability Zone.

Each AWS Region consists of multiple, isolated, and physically separate AZ's within a geographic area.

Reference:

https://wa.aws.amazon.com/wat.question.REL_7.en.html

A. AWS Direct Connect

AWS Direct Connect is a cloud service solution that makes it easy to establish a dedicated network connection from your premises to AWS. Using AWS Direct Connect, you can establish private connectivity between AWS and your datacenter, office, or colocation environment, which in many cases can reduce your network costs, increase bandwidth throughput, and provide a more consistent network experience than Internet-based connections.

https://aws.amazon.com/directconnect/?nc1=h_ls

C. AWS and the customer share responsibility.

Security and Compliance is a shared responsibility between AWS and the customer.

https://aws.amazon.com/compliance/shared-responsibility-model/?nc1=h_ls

Option B

https://docs.aws.amazon.com/cli/latest/userguide/cli-configure-quickstart.html

For general use, the aws configure command is the fastest way to set up your AWS CLI installation. When you enter this command, the AWS CLI prompts you for four pieces of information:

Access key ID

Secret access key

AWS Region

Output format

The AWS CLI stores this information in a profile (a collection of settings) named default in the credentials file. By default, the information in this profile is used when you run an AWS CLI command that doesn't explicitly specify a profile to use.

Correct answer: C

The AWS service that is used to provide encryption for Amazon EBS is AWS KMS

It's A and C : "You are charged based on the number of requests for your functions and the duration, the time it takes for your code to execute."

from less to more:

region > availability zones > edge locations

Correct answer is B

AWS Shield Standard: protects against DDOS attack for your website and applications, for all customers at no additional costs

Reference:

https://aws.amazon.com/pricing/cost-optimization/