From what ive learned its false
Answer:
It was caused by an H1N1 influenza A virus that scientists believe mutated from an influenza virus that was previously infecting only birds. It evolved and changed enough that it was able to infect humans and spread rapidly from person to person.
Explanation:
Answer:
A. is your answer for this question
“Serfs belonged to the noble and were bound to the land” “Serfs were able to work off the debt they owed to the lords of the manor.” Are true statements
The answer is 5 I’m not sure if you want a explanation just tell me if u do!