Final answer:
Melismatic chant is a style of vocal music that involves singing multiple notes on a single syllable. It is characterized by its virtuosic aspects and wide range of notes.
Step-by-step explanation:
Melismatic chant refers to a style of vocal music in which many notes are sung on a single syllable. It is known for its virtuosic aspects, as it requires skilled vocal technique to accurately execute the melismatic passages. Additionally, melismatic chant often involves a wide range of notes, with singers frequently spanning several octaves in their performance. Therefore, the correct answer is d. all of the above.