I would go for 'c'. The reason being, is that it doesn't do much, and I am also assuming that offshore drilling will not affect underwater sources, which are linked to the ocean. 
        
             
        
        
        
I think it’s F, c, and a.
        
             
        
        
        
Probability: The chance of something happening and the likelihood of a particular event happening.
        
                    
             
        
        
        
Answer:
These homologous chromosomes represent a maternal and a paternal chromosome
Explanation:
 
        
             
        
        
        
Answer:
The correct option is C: "Oxygen levels would be higher, but carbon dioxide levels would be the same".
Explanation:
The sealed aquarium is paced near a window which means they have access to sunlight, and hence, can photosynthesize. As the plants use up carbon dioxide during the day and give out oxygen during this process, they also respire during the night, a product of which is carbon dioxide. This is why the levels of carbon dioxide will remain the same and level of oxygen will rise because they are photosynthesizing for a longer period during the day than they are respiring during the night. 
Hope that answers the question, have a great day!