How will you use it for provisioning infrastructure?

You have created a custom variable definition file testing.tfvars .

How will you use it for provisioning infrastructure?
A . terraform apply -var-state-file ="testing.tfvars"
B . terraform plan -var-file="testing.tfvar"
C . terraform apply -var-file="testing.tfvars"
D . terraform apply var-file="testing.tfvars"

Answer: C

Explanation:

https://www.terraform.io/docs/configuration/variables.html