which sentence or sentences have correct parallel structure? a visit to new york city can be expensive, but…

which sentence or sentences have correct parallel structure? a visit to new york city can be expensive, but you can save some money by avoiding taxis—simply walk, take the subway, or hop on a bus. a visit to new york city can be expensive, but you can save some money by avoiding taxis—simply walk, take the subway, or hopping on a bus is also a good option.
Answer
Brief Explanations:
Parallel structure requires consistent grammatical form. In the first sentence, "walk", "take", and "hop" are all in the base - form verb, creating parallelism. In the second sentence, "walk" and "take" are base - form verbs while "hopping" is a gerund, breaking parallelism.
Answer:
A. A visit to New York City can be expensive, but you can save some money by avoiding taxis—simply walk, take the subway, or hop on a bus.