'Officious' means very enthusiastic in assisting or helping people.
Option B - 'Dim' meas not having/giving much light. Thus option B is incorrect.
Option C - 'Wandering' means to walk around slowly in a relaxed way or to travel around in any direction. Thus option C is incorrect.
Option D - 'Bureaucratic' is relating to a system of controlling or managing a country, company, or organisation that is operated by a large number of officials. Thus option D is incorrect.
Option E - 'Meddlesome' means to often get involved in situations where you are not wanted, especially by criticizing in a damaging or annoying way. Thus option E is incorrect.
Option A - 'Helpful' means willing to help or enthusiastic to help. Thus option A is the correct answer.
'Officious' means 'Helpful'.