A student reviews only completed chapters but does not check depth of learning. Which improvement is most appropriate?

Correct answer: Add checking of understanding, mistakes, and application

Counting completed chapters measures coverage, not whether the student can explain, recall, apply, or correct the material. A better review checks understanding through questions, analyses mistakes, and applies ideas to examples or problems. Increasing chapter numbers alone may create a false sense of progress, while stopping review or comparing with others gives weaker evidence. Hence, A is best.