Answer
B.
Work Step by Step
A. is wrong since phloem transport is symplastic, and C. can be excluded since it describes xylem transport, not phloem transport. D. is wrong because source-to-sink movement involves bulk flow, not diffusion.
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.