Is it possible to share a custom object record manually?

A.

The answer is: A. True

In Salesforce, it is possible to share a custom object record manually. By default, when a custom object is created, the access to the records of that object is restricted to the users who have the "View All" and "Modify All" permissions. However, you can manually share a record with other users or groups of users, even if they don't have the "View All" and "Modify All" permissions.

To share a custom object record manually, you can follow these steps:

1. Navigate to the record detail page of the custom object record that you want to share.
2. Click on the "Sharing" button, located at the top of the page.
3. In the "Share with" section, click on the "Add" button.
4. Select the users or groups of users that you want to share the record with, and choose the level of access that you want to grant them (Read Only or Read/Write).
5. Click on the "Share" button to save the changes.

Once you have shared a custom object record manually, the users or groups of users that you have shared the record with will be able to view or edit the record, depending on the level of access that you have granted them. Note that manually sharing a record doesn't grant the users or groups of users the "View All" and "Modify All" permissions for the custom object.