The first pci slot operated at a frequency of 33 MHz<span />
Indeed, this is to be true as software is to programs and applications(apps) hardware is to physical computers such as hard drive, SSD, motherboard, ram, graphics card, ect...
Hardware is <u>the physical parts of a computer</u> – its opposite, software, refers <em>to the programs that run in the computer</em>.
Based on that definition, the answer to this question is (C) mouse, while the rest of the options are software or software features instead.