I'm going to give my favourite answer: "it depends".
How effective is the anti-skid? How good are the brakes? How big are the spoilers? How much reverse thrust does reverse give?
Those all depend on the type. Without specifying a type this kind of "canned question and answer" tests nothing except memorisation of data, not understanding.
On some aircraft the reverses do next-to-nothing; on others they are pretty effective. Some aircraft have tiny spoilers, some huge barn doors.
FWIW, I checked one of our AFMs earlier today - loss of half brakes or half spoilers was about twice as powerful as loss of TRs, dry. Assuming a wet braking coefficient of about 25% of dry, that puts all three nicely balanced.
Just to add to the mix: how wet is "wet"?