When Looking at a Three Tier Model of Behavior Supports

When looking at a three tier model of behavior supports, it is important to recognize that

A) All students will require strategies in all tiers
B) Every teacher in a school should modify the plan to make it "their own"
C) The strategies should increase in intensity in sequential tiers
D) Once a student is successful in a tier, the student will remain in that tier for the duration of the school year