Final answer:
A homophonic texture in music is characterized by a primary melody with harmonically complementary accompaniment. Both a Barbershop quartet and a folksinger with guitar accompaniment serve as examples of homophonic textures.
Step-by-step explanation:
Homophonic texture in music refers to the type of texture where a primary melody is supported by one or more additional musical lines which are harmonically complementary, rather than having multiple independent melodies happening simultaneously as in polyphonic texture or just a single line of melody as in monophonic texture.
Within the choices provided, B. Barbershop quartet is an example of a homophonic texture, as typically, the lead sings the melody while the other voices provide the accompanying harmonies. However, C. Folksinger accompanied by a guitar can also represent a homophonic texture, as the guitar provides harmonious accompaniment to the melody sung by the folksinger. A. Solo flute recital would not be homophonic as it is a solo performance, assuming it's just one melodic line without harmonic accompaniment.
Therefore, D. Any of the choices are correct is not accurate, and the best choices from the options given are Barbershop quartet and Folksinger accompanied by a guitar which both showcase a homophonic texture.