To check the code coverage of a class after running all tests, a developer can use the Developer Console.
Option B: View the code coverage percentage for the class using the Overall Code Coverage panel in the Developer Console Tests tab.
Correct Method.
In the Developer Console, navigate to the Tests tab.
After running tests, the Overall Code Coverage panel displays code coverage statistics.
You can see the coverage percentage for individual classes.
There is no Class Test Percentage tab on the Apex Class list view in Salesforce Setup.
Code coverage is not displayed there.
Option C: View the Code Coverage column in the list view on the Apex Classes page.
Incorrect.
The Code Coverage column is not displayed by default in the Apex Classes list view.
Code coverage details are accessed via the Developer Console or Apex Test Execution.
Option D: Select and run the class on the Apex Test Execution page in the Developer Console.
Partially Correct but Not the Best Answer.
While you can run tests from the Apex Test Execution page, it doesn't directly show code coverage for individual classes.
The best place to view code coverage is the Overall Code Coverage panel.
Conclusion:
The developer should view the code coverage percentage in the Developer Console's Overall Code Coverage panel, which is Option B.
Reference:
Checking Code Coverage in the Developer Console
Running and Monitoring Tests
Incorrect Options:
Option A: View the Class Test Percentage tab on the Apex Class list view in Salesforce Setup.
Incorrect.