What is the default maximum number of VPCs allowed per …

What is the default maximum number of VPCs allowed per region?

A.
5

B.
10

C.
100

D.
15

Explanation:
The maximum number of VPCs allowed per region is 5.
http://docs.aws.amazon.com/AmazonVPC/latest/UserGuide/VPC_Appendix_Limits.html