Dora is in charge of the third-shift cashiers at 24-hour superstore. she has worked there for 5 years and recently found out there is an opportunity to make more money if she can move to the stock room and manage the employees there. dora goes to her boss, gary, and asks if she can be considered for the transfer and promotion. gary tells dora, “sorry, we really need someone that can lift and throw stock around, so i'm going to give it to one of our guys.” what advancement barrier is dora facing?