The question seeking to list previous employment would not be considered evidence of discrimination in a job application process because it pertains directly to a candidate's professional experience and qualifications. This type of question aims to gather relevant information that can help employers assess a candidate's suitability for the job based on their work history and skills.
In contrast, the other options involve inquiries that could lead to discrimination based on personal attributes such as age, marital status, or physical appearance. Asking for a photograph could unintentionally promote biases related to the candidate's looks. Inquiring about a husband’s occupation could signal a concern about marital status or gender roles, which is not relevant to job performance. Asking for a birthdate is particularly concerning as it could be used to infer the candidate's age, potentially leading to age discrimination.
Thus, focusing on previous employment is standard practice in hiring processes and is related to the applicant's abilities rather than their personal characteristics.