What should the developer use to store and package the custom configuration settings for the app?

A developer Is asked to develop a new AppExthange application. A feature of the program creates Survey records when a Case reaches a certain stage and Is of a certain Record Type. This feature needs to be configurable, as different Salesforce instances require Surveys at different times. Additionally, the out-of-the-box AppExchange app needs to come with a set of best practice settings that apply to most customers.

What should the developer use to store and package the custom configuration settings for the app?
A . Custom Settings
B. Custom Metadata
C. Custom Objects
D. Process Builder

Answer: B