The sentence that has faulty parallel structure is option B. To make it parallel should be to parents, to teacher and to students
Faulty parallelism is a construction in which two or more parts of a sentence are equivalent in meaning but not grammatically similar in form. Option B does not follow the same grammatical pattern
The first one, a monologue is a speech given by one character to other characters, while a soliloquy is spoken by a character who is thinking aloud. Or maybe the last one.
