If one scans topics and pages of Leonardo da Vinci's notebooks, it becomes apparent that he

A. intended to publish at least some of them.

B. was highly organized about keeping his notes.

C. kept separate books for writing and sketching.

D. kept them strictly for his own use.

update: the answer is D

If one scans topics and pages of Leonardo da Vinci's notebooks, it becomes apparent that he kept them strictly for his own use. The correct answer is D. He never intended to actually publish those works, at least until he achieved definitive results in what he was studying. He wanted to experiment a lot and was interested in many scientific things, many of which could be found in his notes.