See the multi-choice question below:

Sentence 1: Those wheel tracks had first been cut almost a hundred years earlier when the Spaniards had set up their southwestern outposts.

Sentence 2: The Spaniards did not erect outposts is the southwest regions.

If the first sentence is true, then is the second sentence true?
OPT: a). yes b). it is not possible to tell c). no
c).