Answer:
D)
Explanation:
Negative connotation means that the word/phrase/sentence, etc. gives a bad feeling of what is going on. In this case, "highly susceptible" is generally used in describing something that is very likely to gain a negative effect or trait. While having some ozone is good in deflecting harmful UV rays, having a high ozone would affect many parts of the human body, causing a person to suffer. These two are what is given to make the sentence have a negative feel to it.
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(Sorry if the format is weird, I'm not the best at typing answers on the phone.)
