It is c because it will have a more positive connotation.
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.
I would briefly discuss your essays in the intro and make a claim about how you improved. in your body i would talk about why you think you improved and what you could do to get even better
