I'd go with A or C. Definitely not B or D.
Answer:
he seems to sigh then pretty much walk away
Explanation:
thats his reaction
B.. Lowell’s Dedication to Planetary study
Passage starts out with his work and ended with his work.
I believe the answer is idiom, the phrase is not comparing anything so simile and metaphor is out of the question, also personification is giving a non living thing human characteristics.
