Errorless prompting is a teaching strategy specifically designed to prevent learners from making errors during the acquisition phase of a new skill The core idea is to provide prompts that guarantee a correct response and then gradually fade these prompts as the learner becomes more proficient Option C directly reflects the example given in the text by requiring the client to say the answer out loud first the BCBA can ensure the answer is correct before it is recorded in writing This proactive correction prevents the client from practicing or solidifying an incorrect response thus truly achieving no errors Options A B and D describe various forms of prompting graduated guidance positional gestural which while effective in some contexts do not inherently guarantee error prevention For instance even with handoverhand A a client could still attempt to make an error at the point of independent completion if the prompt is faded too soon Similarly placing a stimulus closer B or providing a gestural prompt D increases the likelihood of a correct response but does not absolutely prevent an incorrect selection or action