When a lookup relationship is created between two objects, which three options can the administrator select to help manage situations when a lookup record is deleted? (Choose three.)

By which of the following CMDB aids ITSM processes. (Choose three.)

A company represents their customers as Accounts in Salesforce. All customers have a unique Customer_Number__c that is unique across all of the company's systems. They also have a custom Invoice__c object, with a Lookup to Account, to represent invoices that are sent out from their external system. This company wants to integrate invoice data back into Salesforce so Sales Reps can see when a customer is paying their bills on time.
What is the optimal way to implement this?

What would you use to create Incident records based on email sent by users or systems?

Recently a Salesforce org's integration failed because it exceeded the number of allowed API calls in a 24-hour period. The integration handles a near real-time, complex insertion of data into Salesforce.
The flow of data is as follows:
* The integration looks up Contact records with a given email address and, if found, the integration adds a Task to the first matching Contact it finds.
* If a match is not found, the integration looks up Lead records with a given email address and, if found, the integration adds a Task to the first matching Lead it finds.
* If a match is not found, the integration will create a Lead and a Task for that newly created Lead.
What is one way in which the integration can stay near real-time, but not exceed the number of allowed API calls in a 24-hour period?