Which One of the Following Is the Best Illustration of Metacognition

Which one of the following is the best illustration of metacognition?

A) Andrea is studying for a spelling test.She writes each spelling word five times in her nicest handwriting.
B) Bertrand stays up late studying for a geography test.The following morning in school, he is too tired to think straight during the test.
C) Toni is studying for a history test.She knows that she has trouble with dates, so she checks herself by giving herself a short quiz after each chapter.
D) Madison is preparing to take the Graduate Record Exam (GRE) , so she checks out a GRE preparation book from the local library and reads it from cover to cover.