Final answer:
The statement is true; the sonata form includes three main sections: exposition, development, and recapitulation, which introduce, explore, and reaffirm the thematic material, respectively.
Step-by-step explanation:
The statement that the sonata form design is composed of three sections: exposition, development, and recapitulation is A. True. In classical music, the sonata form is indeed built upon these three main sections. Each part serves a distinct role in the overall structure of the work.
The exposition introduces the main themes, the development explores and manipulates these themes through various harmonies and keys, and the recapitulation brings back the original themes, often in a reaffirmed and resolved state, providing closure to the piece.