What does the following SQL query accomplish?

Question $2$ options:

It retrieves the names of departments without duplicates from the $\text{'}$ HumanResources.Department' table.

It retrieves duplicate names of departments from the $\text{'}$ HumanResources.Department $\text{'}$ table.

It retrieves the department names sorted in descending order from the $\text{'}$ HumanResources.Department $\text{'}$

It retrieves all departments' names from the $\text{'}$ HumanResources.Department $\text{'}$ table.