Answer:
1. Ctrl + C: copies the selected text
Explanation: If we want to copy the text, make it multiple copies on different places of the documents, we can use the key board short key Ctrl + C
2. Ctrl + A: selects all the information on your screen
Explanation: If we want to select all text on the screen, or document, we use Ctrl + A.
3. Ctrl + X: cuts the selected text
Explanation: If we want to cut some piece of text and move to some other place in the document we use Ctrl + X.
4. Ctrl + V: pastes the selected text
Explanation: If we copy or cut some text in the document and we want to paste on the other place in the document we use Ctrl + V.