Which file should a developer use to set the default value when creating configuration fields for admin?

Which file should a developer use to set the default value when creating configuration fields for admin?
A . etc/adminhtml/config.xml
B. etc/config xml
C. etc/adminhtml/system.xml

View Answer

Answer: A

Explanation:

When creating configuration fields for the admin in Magento 2, the default values are set in: etc/adminhtml/config.xml