Maintenance & Scaling — quiz

A 3-year-old test framework has duplicate locators in 40 test classes, hardcoded `Thread.sleep(5000)` waits throughout, and no base test class. Adding one new environment variable requires editing 40 files. What is the correct refactoring sequence?

• Delete the framework and rewrite from scratch — legacy frameworks cannot be refactored incrementally
• Incrementally: first introduce a `Config` singleton to centralise environment access (reduce the 40-file change to 1), then extract shared locators into page objects, then replace `Thread.sleep` with explicit waits. Run tests after each refactor to catch regressions
• Refactoring test code is lower priority than writing new tests — continue adding tests to the existing structure first
• Move all tests to a new package and start fresh, keeping the old tests as-is for backward compatibility