#1. Comma is used to off set the sentence
Answer:2,3 and 4
Explanation: The wording in the first sentence just makes the punctuation wrong
Answer:
12. Further obstacles cannot definitely <em><u>break</u></em> out, but it’s our obligation to carry-on with the investigation until it’s complete.
13. There are rumors that the ministers have tried to <em><u>cover</u></em> up the news of the recent affair so as not to lose face with the public.
<h2> I am not sure but it might help.</h2>
B- is the main idea I bieleve
