Consider the following statements and select the correct answer using the code given below: 1. The principal agents of metamorphism are change in temperature, pressure and composition. 2. Fluvial environments are river channels, river bars, and adjacent flood plains. 3. Eolian environments include sand seas of deserts, where sand dunes are built and transported by wind

• A. 1 and 2 are correct       
• B.        1 and 3 are correct
• C.        2 and 3 are correct       
• D.        1, 2 and 3 are correct