Sentence Structuring ; Which sentence is correctly parallel?

Parallelism in sentence structure means using the same grammatical form for items in a list or series. This creates balance and readability. In the given options, the correct sentence must maintain a consistent grammatical pattern for the activities listed after "She likes." "She likes hiking, swimming, and riding bikes" (C) is correctly parallel because all three activities are presented as gerunds (verb + -ing acting as a noun). This consistency makes the sentence grammatically sound. Let's analyze the incorrect options: "She likes hiking, to swim, and riding bikes" (A) mixes a gerund, an infinitive, and another gerund. "She likes to hike, swimming, and rides bikes" (B) mixes an infinitive, a gerund, and a simple present verb. "She likes hiking, to swim, and to ride" (D) mixes a gerund with two infinitives. Only option C maintains perfect parallel structure.