15 POINTS!!! HELP PLZ!!!
The manager of a large chain of stores wants to know if her employees would be in favor of opening the store one hour earlier in the morning. Which sampling method will most likely result in a biased sample?
a) the manager randomly selects three employees from each store.
b) the manager selects every 10th name on her list of employee names.
c) the manager programs her computers to randomly select employee ID numbers.
d) the manager visits every store at closing time and selects all the employees there.