The development of shipbuilding in 15th Century China was one of the most important features of the country and it also led to many expeditions that were started by admiral Zheng He to different regions, including India, Arabian peninsula, Africa...
Therefore option C is correct, while other options are not correct.
During the second half of the 1920s, Joseph Stalin set the stage for gaining absolute power by employing police repression against opposition elements within the Communist Party.
