Final answer:
Ebola and Marburg are the correct pair of viruses that cause hemorrhagic fevers, characterized by severe symptoms and high fatality rates.
Step-by-step explanation:
The correct answer to the question about which pair of viruses cause viral hemorrhagic fevers is A) Ebola and Marburg. Both the Ebola virus and Marburg virus are known to cause severe hemorrhagic fevers, leading to multiple organ failure and death. These diseases have a significant fatality rate and have been a cause for concern during outbreaks.