Allergic reactions to three native American plants—poison ivy, poison oak, and poison sumac, all members of the plant genus Toxicodendron—have been sources of misery for many centuries. Native Americans warned the early settlers about the ill effects of these plants, and Captain John Smith described them in his journal, thus making the first report of an allergic disease in America. What can the reader infer from this paragraph? A. Captain John Smith is known as a great physician. B. A cure for poison ivy is being developed. C. Many native American plants cause very uncomfortable allergic reactions.