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 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) Dolly is preparing to take the Scholastic Assessment Test (SAT) , so she checks out an SAT preparation book from the local library and reads it from cover to cover.