Your answer is A. good luck :)
Well, that translates to when is the birthday of Jorge's mother, so you would say a date (for example, el tres de enero--it's the <u>(# of day)</u> de <u>(Month)</u>)
He (Which should be El, but anyway) visto is not correct, because you are talking about someone else. Yo Tengo is correct, because you are staying that you have seen.
