The answer should be D because the word "was" almost always makes the sentence past tense. (Im sorry if this is not correct but it should be, Im not the smartest cup of tea)
Answer:
I wish my brother be here
have a good day :)
Explanation:
The correct answer is C. You would not use an R.A. number to replace a missing serial number. Serial numbers on products are not replaceable. Each serial number is assigned to that particular item and no other. It is that items identifying number.
