D is the answer. the incas did not have slaves
Lets see, the Reformation time period was around the 16th century so the letter would be; formal, old fashioned like spanking, This detail is mainly left out but you could add this to your postcard if you want to but they should be careful of word choice to not to insult someone in any way, so that means no mock politeness
I believe the answer you looking for is luster
Good luck