Consider the following statements and select the correct answer using the code given below: 1. The main locational factor for petrochemical industries is the presence of an oil refinery. 2. Most petrochemical plants derive their raw materials directly from refineries by pipelines. 3. In Europe the largest concentration of petrochemical industries is at Amsterdam. 4. Rotterdam is known as Europort. Code:

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