Answer:
D. The deer was not able to pick up the scent of the author.
Explanation:
The whole sentence reads
"The wind must have been right, because he kept on browsing the mossy ground." The deer kept on browsing the mossy ground because it did not pick up the scent of the man. Otherwise, it would have run away.
The best answer among the following choices would be the second option B) Forensics because this classifies as the definition.