I say your answer would be [tex]they're [/tex] ([tex]Option[/tex] [tex]B[/tex])
Because, [tex]"there" = at/place (location)
\\ \\ \\ \\ "they" = 2/more \\ things \\ who're \\ mention \\ in \\ a \\ statement \\ \\ \\ \\ their = belonging \\ to \\ a \\ person[/tex]
Good luck on your assignment and enjoy your day!
~[tex]MeIsKaitlyn:)[/tex]