The sale of human beings in the market on board the ship is carried on thus: Every day Englishmen, Dutchmen and High-German people come from the city of Philadelphia and other places, in part from a great distance, say 20, 30, or 40 hours away, and go on board the newly arrived ship that has brought and offers for sale passengers from Europe, and select among the healthy persons such as they deem suitable for their business, and bargain with them how long they will serve for their passage-money, which most of them are still in debt for. When they have come to an agreement, it happens that adult persons bind themselves in writing to serve 3, 4, 5 or 6 years for the amount due by them, according to their age and strength. But very young people, from 10 to 15 years, must serve till they are 21 years old.Mittelberger, Gottlieb. Gottlieb Mittelberger's Journey to Pennsylvania: in the Year 1750 and Return to Germany in the Year 1754, Containing Not Only a Description of the Country According to Its Present Condition, but Also a Detailed Account of the Sad and Unfortunate Circumstances of Most of the Germans That Have Emigrated, or Are Emigrating to That Country. John Jos. McVey, 1898.In this selection, Gottlieb Mittelberger is describing which of the following?Elimination ToolSelect one answerASlaveryBManumissionCIndentured ServitudeDThe Headright System