The statements that are true for S-waves are:
A. They can only travel through the solid rock inside Earth.
C. They are the second type of waves detected after an earthquake.
The S-wave is the second wave that gets detected by the seismograph. These waves do not travel through the liquid medium. They are also slower than the initially detected P-waves. S-wave also are more destructive than the P-waves but are relatively less destructive than the L-waves and the Rayleigh waves.
