1. What is the central idea of this passage sometimes, history is sadness? A We are all responsible for improving national
security and helping to prevent future disasters.
B It is important to make sure one's friends and
family members are safe following a tragic
event.
C Tragic events will always be a part of history, but
the pain that they cause may lessen over time.
D The World Trade Center was an icon of New
York and a symbol of American values before it
was destroyed