Answer:
Explanation:
1. Virus's are hard to detect because of their simple construction.
2. Some mutate very easily.
3. It is hard to isolate the virus and kill it without doing damage to the host.
I think it is B, but i am not sure
The answer is circuit I believe.
Answer: Mother is bb. Father is Bb
Top left box: Bb
Top Right box: bb
Bottom left box: Bb
Bottom Right box: bb
Hope this helps :D. If you want me to explain my answer just let me know
