One of These Is an Example of Coevolution

Multiple Choice

One of these is an example of coevolution:

A) A seaweed evolving better ways to capture sunlight energy.
B) A seaweed evolving a mechanism allowing it to take in a particular nutrient.
C) A limpet getting adapted to live along coasts exposed to heavier wave action.
D) A limpet evolving a behavior that allows it to escape from a seastar predator.
E) A seastar becoming adapted to move higher up along rocky shores during low tides.