Correct Answer:
A. Ctrl + A
Keyboard shortcuts are essential for efficient computer use, allowing users to perform actions quickly without using a mouse. The fundamental shortcut for selecting an entire document or worksheet is Ctrl + A. The 'A' stands for 'All', making it intuitive for selecting all content. This action highlights every element, enabling subsequent operations like copying or deleting the entire content.
- Ctrl + S is incorrect because it is the universal shortcut for 'Save', used to store changes to a file.
- Ctrl + E is incorrect; while its function can vary by application, it is commonly used for 'Center' alignment in word processors or 'Search' in some browsers, not for selecting all.
- Ctrl + W is incorrect as it typically means 'Close' the current window or tab in most applications.