Answer:
1. “A”
2. “C”
3. “C”
4. “A”or”B”
5. “A”
Explanation: This is just what I think :)
Signs and symptoms include respiratory symptoms and include fever, cough, and shortness of breath. In more severe cases, an infection can cause pneumonia, severe acute respiratory syndrome, and sometimes... you know.
Present tense is the best choice to describe an ongoing action when another one occurs