Answer:
The correct answer is: Find employees at your company of interest, and see whether they are connected to anyone you know.
Explanation:
LinkedIn is a valuable tool for job seekers, because through this business-oriented social network it is possible for a candidate to seek a relationship with a company of interest, view available vacancies and network.
Therefore, the best advice I could give Jennie, who is looking for a position at a specific company, would be to network, seeking some common contact with some employee of the company in question, in order to develop some relationship that could help Jennie to get a job.
LinkedIn is very effective for this purpose, so it is necessary to keep the curriculum up to date, seek information about the company of interest, make new contacts etc.