Electrically charged particles from space travelling at speeds of several hundred km/sec can severely harm living beings if they reach the surface of the Earth. What prevents them from reaching the surface of the Earth?

• A. The Earth's magnetic field diverts themtowards its poles
• B. Ozone layer around the Earth reflects themback to outer space
• C. Moisture in the upper layers of atmosphere prevents themfromreaching the surface of the Earth
• D. None of the statements (a), (b) and (c) given above is correct