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.
Option A is the right answer
Change of tempo:
-Accelerando
-Ritardando
Indicates the overall tempo of a piece:
-Andante
-Presto
-Allegro
The Black Swan opens with dancing and the Smashing Pumpkins announced their breakup in 2000. I hope this helped!