19 is A , 18. Is C. 21. Is A
Since its a sibling, and siblings tend to be in a person's close circle of people, informal speech is used.
In Crusoe's second trip, he characterizes as an adventurous person. It is an adventure that offers him an expense free travel with the captain, and toys and trifles worth 40 Euros for him to carry. He learns a lot from this free trip.
