Ben said, We need to begin working on the project as soon as possible

Which of the following has the correct punctuation for the above sentence?
A.
Ben said, "We need to begin working on the project as soon as possible."
B.
Ben said, "We need to begin working on the project as soon as possible?"
C.
Ben said, "We need to begin, working on the project as soon as possible,"
D.
Ben said, we need: "to begin working on the project as soon as possible."