I think it is B. i apologize if i am wrong! it uses correct grammar when listing things!
Answer:
B.
Explanation:
A and C have awkward sentence structure because "when a car needs many serious repairs, it might be cheaper to buy a new car", it repeats the word car again making it redundant and in C, "When a car had needed many serious repairs, it might be cheaper to buy a new one", it has wrong use of past-tense.
Answer:
I would say that A and B are the best options
Answer:
It's the last one. Achievement.
Explanation:
I took this before so the first one b and and the second one is d