Why are palladium and nickel significant in transition metal-catalyzed reactions, particularly in the context of the 16 electron rule?

Palladium and nickel are significant as they are the least reactive transition metals.

Palladium and nickel are significant because they always follow the 18 electron rule.

Palladium and nickel do not participate in catalytic reactions due to their electron configurations.

Palladium and nickel are able to undergo oxidative addition and reductive elimination efficiently due to their adherence to the 16 electron rule.