Read the sentences from the passage.
" 'California?' Joshua frowned as he tried to recall the United States map that hung in the schoolhouse, attempting to calculate the distance from Ohio. 'Isn't that about as far away from here as you can get?' "
"Traveling to California would take months, and who knew what might happen once Papa arrived."
Which conclusion is best supported by the sentences?
A.
In the past, transportation and communication were limited.
B.
In the past, visual aids were used in schools to help students better understand things.
C.
Joshua and his father considered California a safe place to live.
D.
Joshua and his father were adventurous and liked to travel to faraway places.