This answer is strongly supported. We know from the stimulus that some people, those who are visual problem solvers, mathematical puzzles can cause their awareness to decrease.

This answer is unsupported. We don’t know anything about other problem solvers from the stimulus to make this comparison.

This answer is unsupported. We don’t know what effect non-mathematical puzzles may have on a person’s environmental awareness. The stimulus is limited to the example of mathematical puzzles.

This answer is unsupported. To say that these problem solves “only” become aware during periods of rest is too strong. We know that this may be one period, but not the only period.

This answer is unsupported. We don’t know from the stimulus what is required for a person to solve mathematical problems.