When do you use a coma?

Only use a comma to separate a dependent clause at the end of a sentence for added emphasis, usually when negation occurs.

Explanation:

the correct answer is b. so you can tailor your resumé to the position.

it is important before sending your resumé for you could add some extra information relating to former jobs that might you get a higher possibility to be hired.

may be the company is looking for an experienced person, and showing you have worked in the area they are looking a person for may give you more positive points!