Component visibility filter is the feature on the Lightning app builder that should be utilized to restrict a Lightning component to mobile app users. According to the Salesforce documentation, "Use component visibility filters to show or hide components on a record page based on field values or user profile." Chatter feed, highlights panel, and related list quick links are not features for controlling component visibility, but standard components that can be added to a record page.

One of the easiest ways to display real-time stock price for each account is to install a solution from the AppExchange, such as Stock Price Lightning Component3. This component can be added to any record page using the Lightning App Builder.

To deploy a new account detail page layout from sandbox to production, an app builder should include three components in the change set:
* Detail page layout: The page layout defines the arrangement of fields, buttons, related lists, and other components on a record detail or edit page. It also controls which fields are required or read-only for users. Source
* Custom fields: Custom fields are fields that are created by users to store additional information on standard or custom objects. Custom fields can have different data types, such as text, number, date, picklist, etc. Source
* Custom actions: Custom actions are actions that are created by users to extend the functionality of standard or custom objects. Custom actions can be global or object-specific, and they can invoke different tools such as Lightning components, Visualforce pages, flows, etc. [Source]

To create a custom object along with multiple fields and relationships efficiently from a single interface, the Schema Builder is the ideal tool:
* A. Schema Builder. This graphical tool provides a drag-and-drop interface for creating and modifying objects and fields in Salesforce, allowing for a visual layout of database schema.
Steps to use Schema Builder:
* Go to Setup # Schema Builder.
* Drag the 'Object' element into the schema area to create a new custom object.
* Define the object's properties (e.g., label, API name).
* Drag field elements like Text, Number, or Lookup into the object to create fields.
* Configure each field's properties according to your requirements.
* Connect objects via lookup or master-detail relationships by dragging the relationship fields between them.
* Save the layout to create all elements in Salesforce.
For more information, review Salesforce's Schema Builder documentation.

The app builder should verify that there is an Apex test that provides test coverage for the Flow. An Apex test is a unit test that verifies the functionality and quality of Apex code. Apex tests are required to deploy any change that contains Apex code or references Apex code, such as an auto launched flow3. The app builder should ensure that there is an Apex test that covers at least 75% of the Flow logic before deploying it to production in an active state4. Option B, C, and D are not things that the app builder should take into consideration when planning the deployment.