Answer: A and B are both good, but I think A would be best.
Explanation:
The correct answer is <span>B. Our three main objectives are removing lead from the water supply, replacing the broken pipes, and getting the water flowing again as fast as possible.
A parallel structure means that the same form of words is used throughout the sentence. As you can see here, gerunds are used throughout: removing, replacing, and getting. The other examples are mixing the forms a bit, and therefore do not show parallel constructions.
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The correct option is C.
From the passage given above, we gather that the narrator's wife believed in superstition and hold the believe that all black cats are witches in disguise. The narrator in the passage mentioned the facts about his wife beliefs concerning black cats just because he remembers it at that point in time.
