Under which folder in your cartridge structure you should place the needed files?

To integrate a new payment method with your storefront the 3rd party provider shares with you the endpoints, protocols and needed credentials. After reading all documentation received you realize that they work under SOAP 1.1 protocol.

Under which folder in your cartridge structure you should place the needed files?
A . /services
B . /webreferences2
C . /webreferences
D . /scripts/soap

Answer: C