The Phytoplankton of the Oceans Are Analogous to the Grasses

The phytoplankton of the oceans are analogous to the grasses of the grassland biome because both types of life

A) provide nesting sites for animals in their ecosystems.
B) are the dominant autotrophs of their ecosystems.
C) are structurally similar due to convergent evolution.
D) are long-lived perennials adapted to frequent disturbance.
E) are dormant in cold temperatures.