In the Past,bank Tellers Were Overwhelmingly Male,but Today They Are

In the past,bank tellers were overwhelmingly male,but today they are mostly female.What could explain this shift?

A) Changes in technology made the work easier and less important, which drove down the wages and prestige accorded to the job.
B) The gendered division of labor has increasingly spread to areas of the economy that used to be gender neutral.
C) Banks are more heavily regulated by the government than they were in the past, making them more likely to be sexist.
D) The banking industry is much more important in today's globalized economy and this added prestige draws more women to the job.