Read the following context and choose the best option to answer the question.
Context: Just a 40 - 50 minute presentation , some questions , and free food ! I had a chicken caesar parmesan whatever sandwich and it was really good.23 days left until school starts and nothing new about my job . I do have a lot of options open , though : LD might have a research position open with travel benefits , or I could work part - time back at the place I did my internship , in a different field . Or I got this other guy that 's been hounding me via email to interview for a sw engineering position .
Question: What did the writer do a few days before this event took place ?
Options: 
A. None of the above choices .
B. They tried and retried several recipes to perfect the perfect chicken sandwich .
C. The did some traveling and ate at restaurants that served chicken parm sandwiches .
D. The researched the jobs that would be presenting there and composed a list of questions to ask them .


D