The Accumulation of Glucose in Leaf Cells During the Early

The accumulation of glucose in leaf cells during the early stages of programmed senescence most likely reflects which two factors?

A) absence of sucrose production;increase in photosynthesis
B) decrease in photosynthesis;export of sucrose from the cell
C) absence of sucrose production;release of glucose from intracellular starch stores
D) release of glucose from intracellular starch stores;increase in photosynthesis