The correct answer is (c), criminal assault.
Criminal assault is an act that intentionally or recklessly causes another person to apprehend immediate and unlawful violence. It can be committed by a variety of means, including inciting a dog to attack another person.
In this case, A has committed criminal assault by inciting a dog to spring upon Z without Z’s consent and with the intention to annoy Z. A’s actions have caused Z to apprehend immediate and unlawful violence, and Z has suffered the consequences of A’s actions.
(a), criminal force, is incorrect because A has not used any force against Z.
(b), grievous hurt, is incorrect because Z has not suffered any serious injury.
(d), defamation, is incorrect because A has not made any false statements about Z.