ABA means:
O
A. Blues form
B. Fast-Slow-Fast
O
C. Loud-Soft-Loud
D. A three-section musical form where the music for the first and
third sections is the same.

The answer is D!
It’s not about notes, it’s about the different parts of the music. ABA is actually ternary form, which means that there are three parts:
A. The beginning melody
B. The middle, and a new melody
A. The beginning melody, rephrased.
Think of twinkle twinkle little star. “Twinkle twinkle little star, how I wonder what you are” is A
“Up above the world so high..” and so on is B
The repeat of “twinkle twinkle” from the beginning is A rephrased.
The example may seems childish, but nursery rhymes are an easy way to remember a complicated music theory terms, and you probably already know it by heart!