the cultural practice is number one
Haya existido is the correct answer. so you're right it's B
Pretérito imperfecto: iba, ibas, íbamos, ibais, iban, Pretérito perfecto simple: fui, fuiste, fue, fuimos, fuisteis, fueron. Futuro simple: iré, irás, irá, iremos, iréis, irán.
Hope I’ve helped. If you have any questions feel free to ask me. I’m latinoamerican.
Answer:
C. Nadie
Translation:
Alguien means somone, Nadie means no one.
