Actually, the correct answer is: He is hired to train people to speak properly
The cover letter of any official letter should include the main positive points of the candidate.
It is best to try to put everything that will make it hard for the company to not hire you. In other words, you are selling yourself as the best candidate for the job to them and making sure that you got your best options available. So, an applicant's cover letter should give compact details about one's qualifications, what position one is applying for, why s/he should be hired and why s/he is the best candidate for the job.
The word detrimentally in the sentence is best defined as negatively; harmfully. The adverb detrimentally comes from the noun detriment , which means the state of being harmed or damaged by something.
Helpful : willing to help; useful
Positively : in a good or positive way
Neutral : a neutral person has no opinion.
The correct answer is B: Compressed Air.
All of the other answers (Antifreeze, Batteries and Paint) are products manufactured by people and thus, they can contain toxic chemicals, while Compressed Air is just natural air that was kept under pressure (more pressure than atmospheric pressure) in order to give it some usage in industry.
A man helps her out.
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