Parallel structure means using the same pattern of words to show that at least two ideas are equally important as each other. Parallel structure can be used to create a rythem or a pattern in certain types of sentences.
If I "weren't" dieting, I "would eat?" that ice cream.
I "won't help" if you won't "talk" to me.
If the weather "were" better, we "would go" to the beach.
If Bob "hadn't fallen", he "could've played" in the match.
We "will leave" as soon as Jack "finishes".
If I "hadn't" fallen asleep, I "could've seen" the end of the film.
If you "want" to succeed, you "will work" harder.
I'd say that A) contains the faulty coordination.
Answer:
Keeping an eye on your water usage is a good way to save money and help the planet at the same time. Plenty of us have bad habits that could be costing us hundreds of dollars in water bills over the long run.
Either good for shop openers or D
