The correct answer is long-term
Short term would be something like passing the exam with a high mark, while management would be on devising a plan on how to manage your time. An impossible would be if you planned to do it without even being enrolled in the school.
It means, "Showing great attention to detail or correct behavior."
Example: FPS gamers can be very punctilious in slight movement
< - - - - - Maria opened the locked with her key. ( is the answer)
The answer is a because it doesn't sound right alone without the words after the comma