(1) The Washington Monument is a tall, stone structure located in Washington, DC, that honors America's first president. (2) It is one of the oldest and best-known attractions in our nation's capital. (3) The structure is over 555 feet tall and 15 feet thick at its base. (4) The monument took almost 40 years to build and was finished in 1884. (5) A lack of funds and the outbreak of the Civil War postponed its construction. (6) The Civil War began in 1861 and ended in 1865. (7) Every year, thousands of people from around the world visit the famous structure.

Maria is revising her slide presentation and would like to shorten it. Which sentence is she able to omit without deleting any important information?
A) sentence 3
B) sentence 6
C) sentence 2
D) sentence 7