Now apply the book’s rule to a new example. These sentences are teaching examples, not quotations from the source.
حَضَرَتْ طَالِبَاتٌ.
Translation: Female students arrived.
طَالِبَاتٌ: nominative subject, marked by ḍamma.
رَأَيْتُ طَالِبَاتٍ.
Translation: I saw female students.
طَالِبَاتٍ: accusative object, marked by kasra.