What are three valid ways to exchange data through a Pega Web Mashup? (Choose Three)

Which two statements about guardrails are true? (Choose Two).

Your application is deployed to the cloud. A data source outside your application populates a data access pattern configuration. You receive complaint that the system takes a long time to fetch data each time the case worker accesses information for a different customer?
Which approach solves this performance issue?

A medium-size toymaker wants to fulfill orders received during the peak season in December and process the orders in batches multiple times a day.
How do you implement this use case?

When designing reports with multiple data sources, in which two ways is an association rule different from a class join? (Choose two.)