What do you take to be the strongest objection to property dualism from either Churchland or Bennett, and does it work?

DUALISM: Address ONE of the following two questions: (a) Can the Knowledge Argument (Jackson) and/or the Zombie Argument  withstand the Phenomenal Concept Strategy (Balog) response? (b) What do you take to be the strongest objection to property dualism from either Churchland or Bennett, and does it work?