75 points if you help

Translate the sentence below into english.    pienso que nunca lo sabré. a. she doesn't believe he will ever find out. b. i believe that i'd never find out. c. she thinks that i'll never find out. d. i think that i'll never find out.

Why the renaissance began in northern italy

Enuncia un ejemplo (sea social o natural) en el que creas se puede aplicar el cálculo y argumenta el tipo de proceso que es necesario para modelar tu ejemplo.