Answer:
A: A new blood test makes it easier-and safer-to detect concussions.
Explanation:
The main idea of the passage is A new blood test makes it easier—and safer—to detect concussions.
Notice the phrases question the use of and proposed an alternative way. They suggest that the main idea involves a possible solution to a problem. Here, the main idea is that the problem of detecting concussions without radiation could be solved by a simple blood test.
This means that if you look further and look at nature through different perspectives (for example, view things from a squirrel's angle) you will understand life better, you will become more understanding by learning different things through different views of different living things. I hope this helps! :)
C the speaker suggests that humans like trees must give freely to thrive
Answer:
A. Insert a semicolon after the word paintings
