The point within the Earth where earthquakes originate is ____?

✅ B. Calcium oxalate

✅ C. Heparin

✅ C. Acetylene and oxygen

✅ A. Katabatic wind

✅ A. Evaporation (mixing) fog

✅ C. Both of these

✅ D. Black

✅ D. Temperature of the place where it is kept