(1)When you are in school any subject seems a potential area for a good job.(2)But when you are out on your own,you may find it difficult to land a job.(3)When you are told time after time that there are no jobs.(4)And it is time for some creative thinking and acting.

(5)Do your homework before applying for any job,(6)First,you should study the openings posted in the local newspapers-subscribe to all of them if possible, or read it at the public library.(7)Familiarize oneself with the types of jobs most often available, with the various employment offices, and with the skills most in demand.
(8)Be certain that you own one (and preferably two)"business" outfits jeans,sandals,and tank tops will not impress any potential employer.
(9)When you are certain that your qualifications and the job requirements match compile a proper resume and write a cover letter that is brief and grammatically correct.(10)When you are interviewed, be relaxed and friendly.(11)Write a thank-you note to the potential employer when the interview is over.
(12)Finding a job is not impossible; it just involves taking time and following some well-tested advice.

Sentence 6:First, you should study the openings posted in the local newspapers-subscribe to all of them if possible, or read it at the public library.

What correction should be made to this sentence?

1.replace you with one
2.replace you with they
3.insert a comma after openings
4.replace it with them
5.no correction is necessary

4 ?

Yes, 4.

No, the correct answer is 1. "replace you with one".

The sentence should be corrected to: "First, one should study the openings posted in the local newspapers-subscribe to all of them if possible, or read them at the public library."

The use of "one" is more formal and impersonal, which is suitable in this context. It is a more general term referring to any individual.