What is the ruling on a woman working in a mixed-gender advertising agency, and what should she do when faced with the opposition of her parents, who view her work as a provision from God, and her own desire to leave the job due to its isolation and mixing?

The fundamental principle is that a woman should remain in her home and not go out to work unless there is a necessity, based on the Almighty's saying: "And abide in your houses and do not display yourselves as [was] the display of the former times of ignorance."