Answer:
The type of music that most influenced the emergence of jazz in the postwar era was spirituals. Spirituals were an important form of music for African Americans, originating during slavery and continuing as a significant genre into the postwar period. Spirituals provided a rich source of musical inspiration for early jazz musicians, influencing the development of jazz rhythms, melodies, and improvisation techniques. So, the correct answer is:
O spirituals
Explanation: