Which of the Following Statements Is True About Commitments

Which of the following statements is true about commitments?

A) Once a person makes an initial commitment, he is more likely to agree to future requests that are in keeping with the prior commitment.
B) If a person makes a commitment but later finds out that the original reason for making the commitment was not valid, the original commitment will not affect his later behavior.
C) An initial commitment must be very large if it is going to affect later behavior.
D) All of the above