Some math teachers in Qingnian Middle School have obtained a master's degree. Therefore, some male teachers in Qingnian Middle School have obtained a master's degree. Which of the following is true to best support the above argument? ['Mathematics teachers in Youth Middle School are male teachers.', 'Some of the male teachers in Youth Middle School teach math.', 'Some of the math teachers in Youth Middle School are male teachers.', "Some female middle school math teachers do not have a master's degree."]