Answer:
A
Step-by-step explanation:
Most concise = least words and detail
In sentence A, there are 7 words.
In sentence B, there are 8 words.
In sentence C, there are 13 words.
In sentence D, there are 6 words.
Sentence D has the least amount of words, HOWEVER, it is not as detailed as Sentence A.
Hope this helps :)