context: We didn't do much today , other than travel on a bus for 9 hours going south . We paused in Chillen ( birth place of Chilean revolutionary hero Bernardo O'Higgins ) and did some flea market shopping . i can't understand a word people say to me here .
question: What's a possible reason they traveled on a bus ?
reference: Because the bus ride was cheap .
candidate: because the bus pass was cheap .