Read the article's introduction (paragraphs 1-6). Which selection from the section shows what happened on September 11, 2001?
(A) Two planes flew into the twin towers of the World Trade Center, one flew into the Pentagon and a fourth
crashed in Pennsylvania.
(B) She has attended the ground zero anniversary ceremony, where the towers once stood, every year
since 2001.
(C) President Donald Trump laid a wreath at the Pentagon. He told victims' relatives there: "This is your
anniversary of personal and permanent loss."
(D) Relatives of those who died read from a long list of victims' names. By now, the grief has been handed
down to a new generation.