Answer:
Many of these sections help readers to navigate a document quickly and easily (title page, table of contents, list of figures, and index); others prepare readers for the document (preface, title page, cover); some provide additional useful information that does not belong in the body of the report.
It correct answer is letter A. Emblems. Because I just searched the meaning of emblems and it came up to a similar definition. Emblems are like your hand gestures you make like sign language. Emblems are basically another word for sign language.
I hope I helped the people that need the answer now in 2018!