Choose the correct definition for <apex:actionRegion>

Which of the following variables are not transmitted in the view state? (Choose two.)

What is the optimal syntax for adding a link to a case in a Visualforce page? (Choose two.)

Refer to the code snippet below:

A custom object called Credit_Memo_c exist in a Salesforce environment. As part of a new feature development that retrieves and manipulates this type of record, the developer needs to ensure race conditions are prevented when a set of records are modified within an Apex transaction.
In the preceding Apex code, how can the developer alter the query statement to use SOQL features to prevent race condition within a transaction?
A)

B)

C)

D)

A developer created and tested a Visualforce page in their developer sandbox, but now receives reports that users are encountering ViewState errors when using it in Production. What should the developer ensure to correct these errors?