How to create additional Guide Lines? A. by holding Ctrl key, click on existing Guide Line and drag B. by holding Alt key, click on existing Guide Line and drag C. by holding Ctrl + Alt key, click on existing Guide Line and drag D. Additional Guide Lines cannot be created

The correct answer is: A. by holding Ctrl key, click on existing Guide Line and drag

To create additional guidelines in Adobe Illustrator, you can hold down the Ctrl key and click on an existing guideline. This will create a new guideline that is parallel to the existing one. You can then drag the new guideline to the desired position.

Option B is incorrect because holding down the Alt key will create a new vertical or horizontal guideline, depending on the direction you are dragging.

Option C is incorrect because holding down both the Ctrl and Alt keys will create a new guideline that is perpendicular to the existing one.

Option D is incorrect because it is possible to create additional guidelines in Adobe Illustrator.