Answer:
A. Create a custom object tab.
Explanation:
The custom object refers to an object in which a person creates to store the data and information i.e relevant for the business organization
While the custom object tab is a tab in which the data stored is displayed in the records of the custom object
Therefore according to the given situation, Â since the sales teams used the mobile app and want to create new insight records by using their phones
So for meeting this we should recommend creating a custom object tab