Employment discrimination refers to the fact that the employer has no legal basis and makes various restrictions on potential employees in the future, thereby excluding a phenomenon that should meet the equal employment rights of employees in related positions. According to the above definition, which of the following is employment discrimination? ['A college of arts issued the "Admissions Brochure" which requires female applicants to be up to 160CM and males to be 175CM.', 'A state-owned coal mine recruits underground miners and requires candidates to be male.', 'A company recruits ordinary clerks and requires candidates to be unmarried women.', 'Teachers are recruited from a university. The cost of new teachers is 10,000 yuan if they have a local account, and only 5,000 yuan if they do not have a local account.']