The answer to your question would be the second option; "The pursuit of knowledge should include respect for moral boundaries".
Answer:
Opinon or the subject
Explanation:
Thats what i think is what its asking.
Answer:
'Use a dictionary or thesaurus'
Explanation:
Because, I don't think there is any synonyms in that sentence for that word or anything that gives you a hint about the unknown word meaning, but, if I would make a guess I would say that the following sentence, "No one else had been clever enough to figure it out" would say something about the 'unknown meaning' word. However, usually if I see a word that I can't find its meaning in the following sentence, I would just look up its meaning or find synonyms of that word.
I would say D. Hope this helps :)