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) Betsy stays up late studying for a geography test.The following morning in school, she is too tired to think straight during the test.
C) Connie is preparing to take the SAT Reasoning Test, so she checks out an SAT preparation book from the local library and reads it from cover to cover.
D) Dolly 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.