Help please Read the following selection and use it to help answer the following question:

Dig News August 2011

Last year I went on my first archaeological dig in South America. It was an amazing experience. I had no idea what we might find. As I watched the archaeologists work, I realized how slow and detailed this kind of work could be. It took weeks and even months before we found any clues. Finally, my friend's shovel hit a metal object and made a loud noise. She called for help. I knew this was something big! When we carefully pulled it out of the ground together, we could hardly believe our eyes.

Which of these describes the source above?
A. It is a secondary source: it was written one year after the event.

B. It is a primary source; it is a firsthand account of finding an artifact.

C. It is a secondary source; it is a description of someone else's discovery.

D. It is a primary source; it was written in a science magazine.​