The correct answer is Option D.
The speaker wants to know the place she got a job. WHERE is used to ask about a place. From the answer - IN THE CAR FACTORY, we know that a place is being referred to. Thus WHERE is the correct answer.
The correct verb with JOB is GET. Thus GET is the correct answer
The remaining options are incorrect because:
Option A: WHEN is used to ask about time.
Option B: GOT is the past tense.
Option C: WHO is used to ask about a person.