To change the quality of this interval from perfect to diminished, you must _. options
change D to D♯
change G to G♭
change G to A
change D to D♭

I might be wrong and please correct me if I am but I’d say the answer is
Change G to G flat
Because this has a treble clef
Which to me would me a higher note playing cord. But with note D and a G flat, it might sound off

But like I said it might be wrong so I’m sorry

His contribution to the orchestral genre mainly lies with foreshadowing ideas that are to come like the emergence of the classical symphony, the cadenza for a keyboard, and paired instrumentation;

Answerfrom the mid 19th century to the 20th and on : )