I believe the answer is Participle Phrase.
Answer:
During my first few months looking for a job, I sent out countless resumes and only had one interview. Unfortunately, I was very unqualified for the job at the time. Then a woman I worked with at my part-time job told me about a reporter position opening up at the newspaper chain where her daughter worked. Though I’d never thought about being a reporter, I figured it couldn’t hurt to go on the interview. In addition to interview experience, the opportunity meant I was officially networking. All the job search materials I’d read stressed the importance of networking in finding a job.
Explanation:
When getting a secondary source one thing to remember is it can be created by an educated expert and published in an academic journal. Also, a firsthand account published in a magazine will also work as a secondary source. So bother A and B will be correct. If only one can be chosen, A would be the better of the two. <span />