How to fix this?

John wants to use two different regions to deploy two different EC2 instances.

He has specified two provider blocks in his providers.tf file.

provider "aws" { region = "us-east-1" }

provider "aws" { region = "us-west-2" }

When he run terraform plan he encountered an error .

How to fix this?
A . Use another provider version
B . Use alias for region = "us-west-2"
C . Use default keyword with region = "us-east-1"
D . It can not be fixed