An Apex class does not achieve expected code coverage. The testSetup method explicitly calls a method in the Apex class.
How can the developer generate the code coverage?

Universal Containers wants to use a Customer Community with Customer Community Plus licenses so their customers can track how many containers they are renting and when they are due back. Many of their customers are global companies with complex Account hierarchies, representing various departments within the same organization. One of the requirements is that certain community users within the same Account hierarchy be able to see several departments' containers, based on a junction object that relates the Contact to the various Account records that represent the departments.
Which solution solves these requirements?

What is a consideration when testing batch Apex? (Choose two.)

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?

Which use case can only be performed by using asynchronous Apex?