To accurately answer your question, I would need the specific content of Slides 14-15 you are referring to since I don't have the ability to read them. However, I can provide general information about the number of spinal nerves in humans and frogs based on common biological knowledge.
Humans typically have 31 pairs of spinal nerves, while frogs have fewer, usually around 10 pairs. Based on this information, the correct answer would be:
c. Humans have more spinal nerves than frogs.
If you have specific details from the slides that you would like to share, I can help interpret that information!