GMAT Sentence Correction (SC) | Re: A New York City ordinance of 1897 regulated the use of

This question is a subtle mixture of a Parallelism error and Meaning
We can start by asking two questions:
What was the purpose of the New York City Ordinance? To regulate the use of bicycles.
How did it regulate the use of bicycles? - mandated......., required......
The third question will be. " What did it achieve by doing this?It granted pedestrians right- of- way.
Hence the 3 items of the list are: regulated, mandated and granted
A. Mandated, required and it granted...usage of the
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