Which pronoun correctly completes the elliptical clause?

does the news article mention jeff more times than

a.
she

b.
her

"Her" would be a more informal, but valid, way to say it while "she" is the expected way to say it in school work and business writing.

not concrete, existing in thought or as an idea but not having a physical or concrete existence

either online or traditional classroom can work for students. which is better will depend on students and teacher. students may have trouble following a lesson in classroom while they can study at their own pace online. other students may have trouble staying focus on their own in online classes. teachers are more used to classroom teaching but they may also be more worry about their jobs teaching online classes and work harder.