Which of the following is commonly included in a quick CSS debugging checklist?

• A. Inspect computed styles
• B. Update server-side code
• C. Optimize images
• D. Change the page title

Answer: (A)

When debugging CSS quickly, the most useful step is inspecting the computed styles in your browser's developer tools. This reveals exactly what values the browser has ended up applying after all cascading, specificity, and inheritance rules are processed. Seeing the computed width, height, margins, paddings, fonts, colors, and display properties helps you pinpoint where a style is coming from and why it isn’t behaving as expected. It lets you see overridden rules, inherited values, and which stylesheet or rule set set a particular property, so you can adjust precisely.

The other activities aren’t about CSS debugging: updating server-side code changes backend behavior rather than presentation; optimizing images deals with performance and resource loading, not how elements are styled; changing the page title affects document metadata, not the CSS or layout.