Multiple Choice
The cause of the P-wave shadow zone includes: 
A) P-waves are converted to S-waves,which cannot travel through the core
B) some P-waves are refracted upward before they reach this zone
C) some P-waves are refracted inward into the core,through which they cannot travel
D) the P-waves travel curved paths and are prevented from reaching the core-mantle boundary
E) all of these
Correct Answer:

Verified
Correct Answer:
Verified
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