John is completing an internship in biology at the Clearwater Marine Aquarium. While interning there, he monitors an outdoor phytoplankton exhibit to observe how populations of phytoplankton change when exposed to light. It is observed that each year the phytoplankton population within the exhibit increased by 3,000 organisms when it was exposed to high amounts of sunlight. A new high rise apartment complex that overlooks the beach is being built. The new apartment complex will stand between the marine aquarium and the sun. The phytoplankton that were receiving 8-12 hours of sunlight each day will now have between 2-5 hours of sunlight. Which of the following statements is most likely to occur as a result of the new apartment complex?
A. The population will decline over time
B. The population will decrease their need for food
C. The population will migrate to another body of water
D. The population will choose to evolve new adaptations

It is unlikely that the population will decrease their need for food, although this might be a plausible explanation over time as organisms evolve although this is very rare and if this so, will happen many years later after an initial decrease in population. This explanation applies for D although D is incorrect in stating that evolution is a choice. It is unlikely for Option C as the organisms are in an aquarium.