Answer:
redundant
Explanation:
not or no longer needed or useful
Answer: B
Explanation: The sentence starts with because and does not explain why there is a because there.
This is a hard one and I can see why you decided to post it here. B is most definitely wrong but the other three are all neck and neck. There are both even pros and cons of A and C but I think it would be more reasonable to adopt a general routine. So I think the answer would be C.
I believe the answer is C. But this is just what I was taught. This may vary based on school system.
