Answer:
Step-by-step explanation:
The correct answer is D: a capella.
When a gospel quartet sings without instrumental accompaniment, it is known as singing a capella. The term "a capella" comes from Italian, meaning "in the manner of the chapel." It refers to vocal music performed without any instrumental backing.
Singing a capella allows the focus to be on the harmonies and vocal abilities of the performers. Without instruments, the singers must rely on their voices to create the melodies, harmonies, and rhythm of the music. This style of singing can create a unique and intimate musical experience.
In the context of a gospel quartet, singing a capella allows the voices to blend together harmoniously and showcase the richness of their vocal abilities. It is a traditional and often powerful way of delivering gospel music, allowing the lyrics and emotions to be conveyed with clarity and depth.
So, when a gospel quartet sings without instrumental accompaniment, they are singing a capella, making option D the correct answer.