Files created with Lotus 1-2-3 have an extension A. DOC B. XLS C. 123 D. WK1

The correct answer is D. WK1.

Lotus 1-2-3 is a spreadsheet program that was developed by Lotus Development Corporation in 1983. It was one of the first spreadsheet programs to be widely used, and it helped to popularize the use of spreadsheets in business and personal computing.

Files created with Lotus 1-2-3 have a .wk1 extension. This extension is used to identify files that are created with Lotus 1-2-3. Other spreadsheet