Exam Certified Platform Developer II topic 1 question 202 discussion

Actual exam question from Salesforce's Certified Platform Developer II

Question #: 202
Topic #: 1

[All Certified Platform Developer II Questions]

A company recently deployed a Visualforce page with a custom controller that has a data grid of information about Opportunities in the org. Users report that they receive a `Maximum view state size limit` error message under certain conditions.
According to Visualforce best practice, which three actions should the developer take to reduce the view state? (Choose three.)

A. Use the transient keyword in the Apex controller for variables that do not maintain state
B. Use the final keyword in the controller for variables that will not change
C. Use the private keyword in the controller for variables
D. Refine any SOQL queries to return only data relevant to the page
E. Use filters and pagination to reduce the amount of data