Answer:
Chopin's first étude focuses on a rippling chord progression. The piece is composed in the same ternary (or A-B-A) form as most of his Op. 10 études, introducing two ideas before coming back to repeat the first.
Insufficient information.
The answer is C as shown on brainly. Theres a question posted on brainly just the exact same as yours. I'd stick with C because the person had given a full explanation to it, I can't copy & paste but I would if I could.