A bar code feature in an app would be best used for assessing the nutritional value of an item at the store. Thus, option "A" is correct.
<h3>What is a barcode reader?</h3>
A barcode reader (or barcode scanner) is an optical scanner that can read printed barcodes, decode the data contained in the barcode and send the data to a computer.
Like a flatbed scanner, it consists of a light source, a lens and a light sensor translating for optical impulses into electrical signals.
Thus, option "A" is correct.
To learn more about barcode click here:
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