Which of the following sentences is written CORRECTLY?
Students learn the value of timeliness and the effort that is required to fulfill a commitment.
Students learn the value of timeliness, and the effort that is required to fulfill a commitment.
Students learn the value of timeliness. And the effort that is required to fulfill a commitment.
Students learn the value of timeliness and the effort. That is required to fulfill a commitment.
Leave it as is.
