_____ she is the only daughter of the boss, she started from the lowest position as a common employee.

_____ she is the only daughter of the boss, she started from the lowest position as a common employee.

  A. Unless     B.  While       C.  Since             D. As

_____ she is the only daughter of the boss, she started from the lowest position as a common employee.

1. A.
   Unless
2. B.
   While
3. C.
   Since
4. D.
   As