Desdemona bought a used computer for her graphic design work, but she doesn't load Photoshop because there wasn't enough room on the hard drive. How much disk space did she need, at a minimum?

A. 3 GHz
B. 1 GHz
C. 2 GHz
D. 4 GHz

None of the options provided (3 GHz, 1 GHz, 2 GHz, 4 GHz) represent the amount of disk space needed. Disk space is typically measured in gigabytes (GB) or terabytes (TB). Therefore, the answer cannot be determined with the given options.

The disk space requirement for an application like Photoshop is typically measured in terms of storage capacity (e.g., gigabytes or terabytes), not in terms of processing speed (e.g., GHz).

To determine the minimum disk space needed for Photoshop, it is best to refer to Adobe's official system requirements. As of May 2021, Adobe recommends a minimum of 4 GB of available hard-disk space for Photoshop installation. Therefore, the correct answer is D. 4 GHz.

Please note that the term "GHz" refers to the processing speed of a computer's central processing unit (CPU), which is not directly related to disk space requirements.