Cloud Kicks wants to start tracking how many shoe subscriptions have been sold for each shoe catalog. A master-detail relationship exists between the Subscription__c and the Shoe__c objects.
Which type of field should an app builder create?

How should an app builder configure access to a contact's Twitter profile for Salesforce mobile app users?

Universal Containers utilizes opportunities and a custom object called Detaited.Sales__c. The company would like to roll sales metrics up to an opportunity for only Detailed.Sales__c records that have their picklist status set to Active.
What is the recommended method for the app bunder to achieve this request?

The VP of Sales at Universal Containers has asked the app builder to let sales reps create opportunity records directly from the account, with a number of fields pre-populated.
Which feature should the app builder use to allow users to create the opportunity?

Cloud Kicks has three types of customer support processes: Platinum, Diamond, and Bronze. The app builder created separate record types for each process on the Case object. The customer support team should be unable to create new cases with the Bronze record type.
How should this requirement be met?