In the baseline instance, which of the following states are available for incidents? (Choose all that apply.)

Which of the following tables does the change_request_sla database view join? (Choose all that apply.)

Which table does the "Knowledge Base" table extend from?

An Apex Trigger creates a Contract record every time an Opportunity record is marked as Closed and Won.
This trigger is working great, except (due to a recent acquisition) historical Opportunity records need to be loaded into the Salesforce instance.
When a test batch of records are loaded, the Apex Trigger creates Contract records. A developer is tasked with preventing Contract records from being created when mass loading the Opportunities, but the daily users still need to have the Contract records created.
What is the most extendable way to update the Apex Trigger to accomplish this?

Universal Containers wants to track expense reports and expense line items. Values from expense line item records need to be aggregated and displayed on the expense record.
Which type of relationship should an administrator use to ensure that expense line items can be aggregated?