In the Temperate Zone, Toward the End of the Spring

Question

In the temperate zone, toward the end of the spring
A) The water column becomes more stable vertically
B) The water column becomes less stable vertically
C) Mixing from below brings bottom nutrients toward the surface
D) The phytoplankton begin a secondary early summer increase

Accepted Answer

As spring progresses into summer, increased solar heating and reduced wind mixing lead to stratification, making the water column more stable vertically.