Water transport through soil occurs mainly by:
C fits best: Bulk flow. Keep the WATER TRANSPORT basics straight and Bulk flow stands out as the precise answer. Avoid: A) Diffusion; B) Active transport; D) Osmosis. Light and flowering items often hinge on which photoreceptor or day-length rule is in play.
Ref: Best CSIR NET Plant Physiology books: Master Unit 6 with Taiz & Zeiger and Salisbury & Ross. Crack Part C experimental questions with top textbooks.