Consider the following statements and select the correct answer using the code given below: 1. About 3.5% of seawater consists of dissolved substances. 2. Variations of 0.1% in salinity are significant, therefore oceanographers prefer to use parts-per-thousand notion (%) rather than per cent (%) in discussing salinity. 3. Nearly every element present in the crust and atmosphere is also present in the oceans.

• A. 1, 2 and 3 are correct
• B. 1 and 2 are correct
• C. 2 and 3 are correct      
• D. None of the above is correct