I would say a
<span>.increase in supply</span>
<span>Electronic scanners that track consumer purchases are examples of the observation method of marketing research.Because they observe it and checks whether it is the correct input and also it checks whether the pattern is match with the already inputted format. Without proper output of scanners we can't proceed the purchase.</span>
This answer is true, because merchandisers design window displays, t shirts, and all kinds of stuff
