Which of the following sentences is the best definition； of a log line in this lecture？

Which of the following sentences is the best definition； of a log line in this lecture？
A.It is a one-sentence summary of the script.
B.It is a knotted corD.C.It is a summary of； a television program or film.
D.It is a line to which a ship’s log is attacheD.
正确答案：It is a one-sentence summary of the script.