Answer:
The control group is defined as the group in an experiment or study that does not receive treatment by the researchers and is then used as a benchmark to measure how the other tested subjects do.
Explanation:
Itching is activated by a chemical called histamine. It's associated with our immune system. It is what causes the red marks and itching from bug bites.
When you separate the two pov, you get to see their two sides do the story. But by combining them you see the whole story.
I don’t know how to answer the last two tho sorry
Answer: D) Ingrid is the best swimmer on her school's swim team.
Explanation: This option combines information from both sentences in a reasonable and grammatically correct way.