In 'Tuck Everlasting' How do the Fosters respond to the man in the yellow suit's request?

A.
They agree with his demands.

B.
They try to change the man's mind and offer him money.

C.
They call the constable to arrest the man.

D.
They don't believe the man and ask for proof of the kidnapping.

Please make sure you know the answer, and please dont just take my points