Handwriting, in a broad sense, is a mark with a limit on the text specification written on a certain interface by using various tools. In a narrow sense, it refers to the writing with a limit on the text specification left on the paper by the writer in the natural state Traces. Because the writer's personality and psychological characteristics are different, it can be speculated that studying the handwriting of the person can analyze the writer's personality characteristics and psychological state. Which of the following, if true, would best support the above speculation? ['Different strokes and stroke structure are different.', 'Since modern times, many advanced theories and instruments have been used for handwriting identification.', 'According to the survey, many companies now include handwriting analysis when recruiting employees.', "Writing pressure, stroke structure and font size can reflect people's self-awareness and attitude towards the outside world."]