Its B. out of common knowledge and experience <span />
this is the exchange of gases and nutrients.
It took me a bit but i figured it out!
Hope this helps you some!:)))
1-G, 2-D, 3-B, 4-F, 5-C, 6-A, 7-E
Answer: The real answer is 40 degrees.
Explanation: However thats not an option, so be safe and go for 39