Questions on your list (which is appreciated) if anyone can fill these in: -Which have (legal) US compliance? -Which have options/futures or other contracts?

Questions on your list (which is appreciated) if anyone can fill these in: -Which have (legal) US compliance? -Which have options/futures or other contracts? -Which have red flags (holds on withdrawls for mysterious reasons, like Poloniex, for example) -Which have security red flags? -Which have actual support help? -What countries are they based in?