How was the call-and-response concept in blues music different than the traditional call-and-response music?

a) In blues music, the call is given by the group and the response is given by the soloist.

b) In blues music, both the call and response are given by the soloist.

c) In blues music, both the call and response are given by the group.

d) In blues music, the call is given by the soloist and the response is given by the group.