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One advantage of laser barcode readers over LED based barcode readers is: (A) the whole barcode is read at the same time. (B) they are

One advantage of laser barcode readers over LED based barcode readers is:

(A) the whole barcode is read at the same time.

(B) they are generally less expensive.

(C) they operate at greater distances from the barcode.

(D) they can be installed between the keyboard and the computer.

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