Which statement accurately describes the relationship between a companion cell and its sieve tube cell?
- AThe companion cell provides all of the ATP used for energy-requiring processes in both types of cell.
- BThe companion cell controls the active transport of molecules through the sieve plates.
- CThe companion cell prevents side-to-side movement of assimilates between sieve tube cells.
- DThe companion cell provides a nucleus that controls cellular activities in both types of cell.