Which of the following is true about "seniority rules"?

Josh’s headmaster fought to keep him, but his hands were tied; under the state’s strict "last in, first out" seniority rules, enshrined in statute, the most recent recruits had to be fired first, regardless of ability.

Students may be reluctant to speak up in class, but they are more than happy to express their views of their teachers anonymously online. That provides a potentially useful pool of data. With assistance from New York University, a researcher has analyzed 1, 289, 407 reviews of 1, 066 professors and lecturers in New York state. Most of the commentary is innocuous: professors are praised for their brilliance and generosity, and admonished for being boring or tough graders.