See the multi-choice question below:

Sentence 1: I am reluctant to dignify his hatchet job with a lengthy reply, but some of his claims are so defamatory that they should be addressed, if only for the record.

Sentence 2: His claims are ridiculously negative and untrue, so should be discussed for the record.

If the first sentence is true, then is the second sentence true?
pick from the following. (a). yes; (b). it is not possible to tell; (c). no;
(a).