According to Marchese et al. (2012), which of the following are potential problems with presenting the vocal instruction "what is it" combined with presentation of the nonverbal discriminative stimulus during tact training (select all that apply)? Group of answer choices Once tact training is implemented with the question, it can never be faded to produce a pure tact trial The child might learn an additional skill of answering questions and that is not the goal of tact training Learners might imitate part of or the entire supplemental question The acquired responses might not be emitted unless the question is posed (I.e. prompt dependence) The supplemental question might acquire intraverbal control over early responses and interfere with the acquisition of subsequent tact targets Including supplemental questions during tact training might impede skill acquisition