Answer:
a restrictive sentenced defines the meaning of a noun or noun phrase and provides necessary information about the noun in the sentence. it is not separated from the rest of the sentence by commas.
<span>. c.Scientists studied the trapping of gases in the atmosphere.</span>
Explanation:
?????<u>?</u><u>?</u><u>?</u><u>?</u><u>?</u><u>?</u><u>?</u><u>?</u><u>?</u><u>?</u><u>?</u><u>?</u><u>?</u><u>?</u><u>?</u><u>?</u><u>?</u><u>?</u><u>?</u><u>?</u><u>?</u><u>?</u><u>?</u><u>?</u><u>?</u><u>?</u><u>?</u><u>?</u>
I think it's B. will be changed in a negative way.