Answer: The best answer is "B"
recitative
Step-by-step explanation:
Aria: an aria is a self-contained piece for one voice, with or without instrumental or orchestral accompaniment, normally part of a larger work.
recitative: imitates speech using pitch fluctuations, rhythms.
Oratorio: An oratorio is a musical piece that is usually lengthy and based on some Biblical or religious event.
Arioso: arioso is a category of solo vocal piece, usually occurring in an opera or oratorio, falling somewhere between recitative and aria in style.