The religious leaders do not provide an answer to Jesus' question. They are in a bit of a trap. If they were to say John's baptism was from heaven, then the obvious question would be, "Why then did you not believe him?" (ref. Mk. 11:31). If they were to say John's baptism was from man, not from God's authority or heaven, they feared what the people might do because they saw John as a prophet of God. So, they do not answer Jesus' question.
