<span>A.
Half the students were failing the course near the end of the school year.
The sentence is written in passive voice because the course is the subject of the sentence and was being failed is the main verb phrase. The course can't fail. The students are the ones who are failing so to change it you must make the students the subject of the sentence. A is the only option that makes the students the subject.
</span>
Sorry. You have forgotten to add the paragraph.
Answer:
The question is not clear. A dangling modifier is a word or phrase that modifies a word not clearly stated in the sentence. Hope that helps.
