This literary term is called an "epiphany". They are quite common and have been occurring in literature as far back as ancient Greece. A writer famous for his characters' epiphanies is James Joyce for example.
4 is answer
If you wanna know why I’ll tell you!!
The subjunctive mood is the best.
The subjunctive is rarely used in colloquial English. Totally irrelevant information, but... it is a relic from Latin, where there are many uses for a subjunctive. There is even a special conditional using the subjunctive mood that expresses the exact circumstances you described, which is usually called future less vivid.
B. A young girl is conflicted because, in traditional Chinese culture, women do not work, yet in America, her mother must work.
Hope this helps
