Which of the procedures below may be recommended in a token economy? Group of answer choices Select the tokens that the learner does not already prefer and do not already act as reinforcers. HINT: Review "objects of obsession". Removing a number of tokens upon problem behavior or when the task criterion is not met. HINT: Can a response cost enhance the effects of a token economy? All options are recommended. Have the learner keep their own token tracking system (e.g., token board) and place a token or a tally by themselves so that supervision and monitoring from the teacher are not required. HINT: Is this appropriate? Can they just deliver tokens to themselves whenever they want