Answer:
Correct is your answer
Step-by-step explanation:
1. I tried incorrect and got it wrong.
2. The definition of Sage in OW is: (noun) an aromatic plant, used as an herb; (adj.) wisdom
So if his sage advice saved the day it would be using it correctly.
I think saying "His sage advice saved the day." is an odd way to use the word sage, but it's the correct answer to your question.
Hope I helped!!!
Have a great day:)