Considering the situation described above, the demands of work and her work projects are stressing Jennifer out, which results in work-family conflict.
This is because Work-family conflict is a type of phenomenon which occurs when an individual is having difficulty combining the work and family roles.
This is evident in Jennifer's situation whereby she is a single mother of two, yet she still works at night, stressing her out.
A work-family conflict often leads to psychological issues, as shown with the stress Jennifer is experiencing.
Hence, in this case, it is concluded that the correct answer is "work-family conflict."
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