Final answer:
The two modifier keys used to select multiple files in Windows are [Shift] and [Ctrl].
Step-by-step explanation:
The correct answer is A) [Shift] and [Ctrl].
When selecting multiple files in Windows, you can use the [Shift] key to select a range of files that are adjacent to each other. For example, if you have a list of files and you want to select files 1, 2, and 3, you can click on file 1, hold down the [Shift] key, and then click on file 3. This will select files 1, 2, and 3.
Alternatively, you can use the [Ctrl] key to select multiple files that are not adjacent to each other. For example, if you have a list of files and you want to select files 1, 3, and 5, you can click on file 1, hold down the [Ctrl] key, and then click on files 3 and 5. This will select files 1, 3, and 5.