Final answer:
The correct answers to the student's questions are nematode for a nonsegmented worm causing abdominal symptoms (option A) and cestode for a worm with segments containing reproductive organs (option C). Biological context, not software-related worms, is the focus here.
Step-by-step explanation:
The question provided seems to address characteristics of different types of software threats as well as biological parasites, specifically worms. However, based on the examples given, such as the beef tapeworm (Taenia saginata) and the guinea worm (Dracunculus medinensis), it is clear that the context is biological and pertains to parasitic worms.
Descriptions and Types of Worms
Taenia saginata is a cestode, which is a type of segmented worm that commonly resides in the digestive system of humans and can grow to a considerable length. It is typically transmitted to humans through the consumption of infected undercooked beef. Dracunculus medinensis, or the guinea worm, is a nematode and is one of the nonsegmented worms that can cause severe discomfort when it emerges from the skin.
When it comes to the options provided:
- An adult nematode could be the cause of abdominal cramps, nausea, and vomiting as found during a colonoscopy (option A).
- A cestode, such as Taenia saginata, has segments and can contain both male and female reproductive organs, often attaching to the intestinal wall with hooks (option C).