Here's a problem to solve: Climate change may be reducing the amount of ice floating on the world's oceans. How can this change most likely alter the food supply available to marine consumer organisms?

Among the 4 following options, which is the correct answer?

- A: by decreasing the amount of salt dissolved in ocean water
 
- B: by increasing the water's ability to separate into distinct layers
 
- C: by changing temperature conditions that single-celled producers require
 
- D: by preventing organisms from responding quickly to environmental change
 