Answer:
To make the writing smoother
Explanation:
The purpose of transitions make the writer flow easier and allows the audience to be able to read the essay more easily. This allows them to focus on the argument at hand
By stopping using harmful chemicals
<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.
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