Consider the following statements regarding continental shelves: 1. They can extend up to a depth of 100 fathoms. 2. They extend between coast and continental slope. 3. They cover more than 10 per cent of the sea surface area. 4. Maximum width of the continental shelf is found in the Atlantic Ocean. Which of the above statements are correct?

• A.  1 and 2 only    
• B.  2 and 3 only
• C.  1,2 and 3 only              
• D.  1, 2, 3 and 4