The correct answer is: D. Press the delete key

The delete key is located on the right side of the keyboard, below the right shift key. It is used to delete the character to the right of the cursor.

The left mouse key is used to select text. Double clicking the right mouse key opens a context menu. The backspace key is used to delete the character to the left of the cursor.

Here is a diagram of a keyboard, with the delete key highlighted:

I hope this helps!