Multiple choice Which of the following does Mach 3, Sensor, Trac 3, Atra etc. represent? Product item Product line<o:p></o:p> Depth of a product line<o:p></o:p> Product mix<o:p></o:p> Reveal answer Fill a bubble to check yourself C Correct answer Explanation The following example belongs to depth of a product line which can be defined as the number of product items altogether.