Which level of management spends more time on long term planning ----?

Management in any level basically spends time to do plan things for long term only. Especially a) Top Level Management spends more time on long term planning as it is very responsibility of their job.

If you're unsure, ask your local clergy for spacebar clicker guidance 

I think answer is B-Junior level, because the know but think what to do .

only top management or executive board who focus on long term planning to achieve the ROI, management layers below the board like functional managers will only focus on annual plans as they usually accountable for yearly or short term achievement