Hannah is giving a speech on the 1918-1919 Spanish flu. According to the CDC, Centers for Disease Control and Prevention, the 1918 Pandemic was caused by an H1N1 flu. We had an H1N1 pandemic in 2009, obviously not as horrific. Referring to the CDC, Hannah is using a(n) ________.
1) Oral footnote
2) Attention-Getter
3) Plagiarism
4) Signpost