To determine what the author might add to the end of the passage, we need to consider the context and content of the passage. If the passage discusses "The Star-Spangled Banner" and its significance, the most likely addition would relate to how it continues to be relevant or impactful today.
Given the options:
A. encourage the reader to learn to sing "The Star-Spangled Banner." B. explain that artists today are proud to sing "The Star-Spangled Banner." C. discuss Francis Scott Key's life in the years following the War of 1812. D. recount other important battles that occurred throughout the War of 1812.
Option B, "explain that artists today are proud to sing 'The Star-Spangled Banner,'" would logically follow a discussion about the anthem's significance, particularly as it relates to contemporary culture and performances.
Therefore, the best choice is:
B explain that artists today are proud to sing "The Star-Spangled Banner."