your answer is A) hope this helps
Green?? Sorry I don’t really get the question
Answer:
A diminished interval has one less semitone than a perfect interval. Since C to G is a perfect fifth (7 half steps), C to Gb would be a diminished fifth (6 half steps). Since C to G is a perfect fifth (7 semitones), C to Gb would be a diminished fifth (6 semitones).
I believe that would be the 18th Century