What are the 2 separate charges for AWS Direct Connect?

Answer options:

A.VPC’s in the region
B.port-hours
C.Data transfer
D.Subnets in VPC

Answer – B and C
The AWS documentation mentions the following
AWS Direct Connect has two separate charges: port-hours and Data Transfer. Pricing is per port-hour consumed for each port type. Partial port-hours consumed are billed as full hours.
For more information on the AWS Direct Connect , please visit the below URL:
http://docs.aws.amazon.com/AmazonVPC/latest/UserGuide/VPC_Appendix_Limits.html