Which of the following sentences is punctuated correctly?
A. President Nixon told the astronauts, "For all of us Americans, this has to be the
proudest day of our lives."
B. President Nixon told the astronauts For all of us Americans this has to be the proudest
day of our lives.
C. President Nixon told the astronauts, "For all of us Americans this has to be the
proudest day of our lives"
D. President Nixon told the astronauts "For all of us Americans, this has to be the
proudest day of our lives"