All the folk materials have black dialect and call-and-response except.
A.Spirituals
B.The Blues
C.Ragtime

Answer:
✔️Ragtime
Explanation:
Both Spirituals and The Blues are the folksongs that have black dialect and call-and-response except Ragtime.
Both spirituals and blues are music genres which are known to be associated with African American music. The use of the black dialect is found. Also, call-and-response is found in both spirituals and blues. In this type, the leader usually acts as a guide for the musicians.