PLEASE HELP which form of tener do i use here?

Manuel: ¿ustedes estudiaron economía en la universidad? elena: no. yo literatura, y rafael filologia. a. estudiaron, estudié b. estudiamos, estudió c. estudié, estudió d. estudiamos, estudié

Which one of the following is the correct rhyme to keep in mind when using the spanish counterparts to this, that, those and these? a “this” and “these” both have t’s, “that” and “those” don’tb “that” and “those” both have t’s, “this” and “these” don’tc “that” and “those” both have s’s, “this” and “these” don’td “this” and “these” both have s’s, “that” and “those” don’t

How do you say "the world" in spanish