is is it appropriate for Diana to ask her coworker about a religious difference? if no, why? if yes, how should she phrase her question?

One of Dianne's new friends at work has a different religion than hers. Although Dianne's friend has never openly mentioned his religious beliefs, the new friend subtly slips into his office at routine times of the day and eats a special diet. Dianne really enjoys the workplace friendship with this coworker and, although Dianne is confident in her own beliefs, Dianne wants to learn more about the friend's beliefs. Dianne sometimes does not know how to behave around this friend when the topic of meals or religion comes up. Dianne thinks about talking to the coworker about the differences but does not want to offend him