The Raw Materials for the Growth of a Plant Come

The raw materials for the growth of a plant come from the translocation of assimilates through the plant by

A) transport in phloem from leaf to root.
B) transport in phloem from root to leaf.
C) transport in xylem from leaf to root.
D) transport in xylem from root to leaf.
E) the direction of transport is dependent on the time of day and the ability of the plant to undergo photosynthesis.