[Solved] When using any type of contrast agent for a radiographic examination, A)the patient should have the final choice on the type of contrast used. B)a thorough medical history must be taken by the imaging professional. C)the cost of the contrast agent is not a consideration. D)anaphylactic reactions are rare and of little concern. Vascular Plants: Plants that have specialized tissues for transporting water and nutrients throughout the organism, including ferns, conifers, and flowering plants. Phylum: A phylum is a classification level in biological taxonomy that is below kingdom and above class, used to group together organisms that share a basic body plan. Rhyniophyta: An extinct group of early vascular plants from the Silurian and Devonian periods. Megafossils: Larger fossilized remains of organisms, such as bones or plant stems, that are easily visible to the naked eye and provide significant evidence of life from the past.