Answer:
B. By carrying out some of the photosynthesis that happens in the leaves
Step-by-step explanation:
Vascular systems can't carry out the process since they don't have chloroplasts that is the main raw material for carrying out photosynthesis.
Vascular system transports water and minerals from the root to the leaves by xylem.
They conduct sugar made in the leaves to roots by phloem.
They bring water to the leaf by xylem.
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