A．The music contained strong political messages.
B．The music had a steady beat that people could dance to.
C．The music included sad melodies.
D．The music contained irregular types of rhythms.
A．The increase in beachfront property value.
B．An experimental engineering project.
C．The erosion of coastal areas
D．How to build seawalls.
A．To protect beachfront property.
B．To reduce the traffic on beach roads.
C．To provide privacy for homeowners.
D．To define property limits.