Answer:
<em>Option "A" might be the correct answer</em>
<em>Explanation:</em>
<em>there are some of those viruses where it can be quite potent. Some viruses, such as the rhinoviruses, seldom cause serious illness. But others, such as parainfluenza and respiratory syncytial virus, can lead to severe lung infections in young children.</em>
Answer:
The answer should be C: mostly in the 20th century
Explanation:
I believe the answer to your question is C, correct me if i'm wrong :)
The energy before and after a process must be the same.
