The statement A is incorrect because the static friction is not constant. Its value changes from zero to the maximum value of limiting friction. It depends upon the force applied on the body to displace it. and kinetic friction is always little less than static friction.

Statement B, C, D are correct because coefficient of static friction is always greater than coefficient of kinetic friction which is equal to the force applied to just move the body divided by normal force, limiting friction is always greater than kinetic friction and it is the force applied to just move the body with constant velocity. And coefficient of limiting friction is always greater than static friction.