Barbara managers the service desk and makes routine decisions related to customer refunds and merchandise returns. Donna also oversees the daily tasks of the cashiers and front desk employees. Donna is a ManagerA) advisory
B) first-line
C) board
D) middle
E) upper

B. First line manager

Explanation:

First line managers are company's employee just directly above the non-managerial worker in the management level or organization structure. They serve as the link between non-managerial workers and middle and upper level managers. They are the lowest managers in an organization that deals with employees directly.

In this case, Donna is directly dealing with cashiers and front desk employees while also making routine decisions.

answer: a. the kind of population living in your neighbourhood.

the census explorer data tool by the us census bureau allows the user to zoom in on any neighbourhood within the united states and find the kind of people residing in that by race and age.  

the tool needs to needs to be used twice – once in order to find what type of people reside in a neighbourhood, and then to see the age groups of the people in the same neighbourhood.