题目选项分析

The use of the bar code, or Universal Product Code, which was created in part to enable supermarkets to process customers at a faster rate, has expanded beyond supermarkets to other retail outlets and has become readily accepted despite some initial opposition when they were first introduced in 1974.

The use of the bar code, or Universal Product Code, which was created in part to enable supermarkets to process customers at a faster rate, has expanded beyond supermarkets to other retail outlets and has become readily accepted despite some initial opposition when the bar code was first introduced in 1974.