Answer:
"Buy the new model of that tablet , its light and very fast."
Explanation:
The you must part doesn't make it sound commanding. It has to start with a verb. The verb here is 'Buy'.
I think this is the right answer. I hope this helps.
For question 1, I believe it is B.
For question 2, I think it is B too.
I might get this wrong tho.
Answer:
C. A paragraph break should come after the word said
Explanation: