Which One of the Following Is the Closest Approximation to Co-Regulated

Which one of the following is the closest approximation to co-regulated learning?

A) Kieran takes detailed notes during a lecture in his class.
B) When studying for a quiz, Malika tries to answer the questions on the study guide her teacher has provided.
C) Suki is studying for a history test. She knows she has trouble with dates, so she checks herself by giving herself a short quiz after each chapter.
D) Norm is preparing to take the SAT test important for admission to many colleges, so he gets an SAT preparation book from the local library and reads it from cover to cover.