Carter is writing a personal narrative about interning at the local newspaper. Read his outline below.

1. Introduction: Introduce how my first internship changed my life
A. My internship at the Corbin Times helped me realize that I wanted to major in journalism and one day be a newspaper reporter.

2. Beginning: On my first day, I walked into the offices of the Corbin Times and had no idea what to expect.
A. I was a little shy and nervous to talk to anyone.
B. I was assigned to the archive department to help with a filing project.

3. Middle: After about two weeks, my supervisor, Ms. Banks, started assigning me more meaningful and exciting work.
A. I started helping reporters research and fact check.
B. I was allowed to observe a reporter as she interviewed the mayor.

4. End: I realized that I wanted to be a journalist.
A. I really enjoyed assisting the reporters, and I thought that I may be able to do what they do one day.
B. I felt like I was providing a service to my community.

5. Conclusion: I decided to study journalism in college.
A. I’m forever grateful to Ms. Banks and everyone at the Corbin Times for introducing me to my chosen profession.

Which term best describes the underlined sentence in the outline?
A. the main idea
B. a topic sentence
C. the thesis statement
D. an important detail