The correct answer is C) they made it easier to engage in trade.
The inventions of paper money and the compass produced similar effects in China during the middle ages in that they made it easier to engage in trade.
With the invention of paper money, commerce between nations was facilitated. Paper money represented a currency. This meant that the value of goods could be represented with the number of paper bills for a better transaction in trade. The compass also helped trade in that the ships and the transportation of goods could be safer in fewer days due to the correct use of the compass. So it is correct to say that the inventions of paper money and the compass produced similar effects in China during the middle ages in that they made it easier to engage in trade.
