From the viewpoint of staff personnel, the major reason(s) for line-staff conflict is/are that line personnel

d is the answer.............................................................

d........................................

(d)  >>>>>>>>>>>>>>>>> (I), (II) and (III) above

answer D ________________________________

Option D  can be the  best answer to your question 

D   is correct ........................................

i agree with Mr. Georges saying that all four may be part of conflict creating however because we are viewing it from the view point if staff personnel ( D ) is closer option

(d)

From the viewpoint of staff personnel, the major reason/s for line-staff conflict are that line personnel

I.     Do not make proper use of staff personnel.

II.     Resist new ideas.

III.    Do not give staff personnel enough authority.

Hence, option (d) is the correct answer.

I believe the answer is I & II:  

I. When you do not make proper use of staff personnel, they don't gain new experience or skills and they feel demotivated most of the time because of routine duties.

II. Resisting new ideas, minimize the staff creativity and their ability to contribute with ideas that benefits the organization.  

I.     Do not make proper use of staff personnel.

II.     Resist new ideas.

III.    Do not give staff personnel enough authority

I would say that all4 options can lead to a certain conflict, indeed the fourth option is less serious.                                                   Thank You.