Which of these pairs is an example of complementary products? a) dvds and vhs tapes b) butter and margarine c) sneakers and sandals d) hot dogs and hot dog buns

The service industry in the united states grew in the late 1800s. what was one effect of that growth? the number of people with jobs in factories as unskilled workers decreased. the number of people with jobs in factories as unskilled workers increased. the middle class grew as people took jobs as clerks, lawyers, and teachers. the middle class shrank as people left jobs as clerks, lawyers, and teachers.