Answer:
D.ferns
Step-by-step explanation:
Ferns are vascular plants, which means they have a system of conducting tissues that transport water and nutrients throughout the plant. They are also the first plants to have true leaves, which are specialized for photosynthesis.
So, the most primitive vascular plant is D.ferns.
- Mosses are non-vascular plants, which means they do not have a system of conducting tissues. They are the simplest type of vascular plant

- Cycads, kelps, and other gymnosperms are more advanced vascular plants. They do not need water for reproduction.