Answer:
16th century to 19th century
Explanation:
The journey became more efficient over the centuries; while an average transatlantic journey of the early 16th century lasted several months, by the 19th century the crossing often required fewer than six weeks.
B because A seems like he was resigned because he was doing something wrong but B makes it seem like he was resigned because of his health and they wish him well,
I believe this is Galic or Irish, if that it is so than the translation is "Irish is very difficult." No this is not google translate this is a legit translation, using wikitionary.