The diagram shows a phloem sieve tube element and a companion cell, both of which take part in the translocation of sucrose. Which process correctly explains how sucrose is translocated through these cells?
- ASucrose moves from Y to Z by active transport.
- BProtons move from Y to Z by active transport.
- CProtons move from Z to Y by diffusion.
- DProtons move from X to W by diffusion.