now, consider the voyages of zheng he, which are among the most famous accomplishments of the ming dynasty. which of the following statements are reasons why scholars speculate that the ming did not try to develop a maritime empire? check all that apply.
a, the decline in japanese piracy made it unnecessary for the ming to maintain a navy
b. the successors to yongle became preoccupied with fortifying the north against mongol attacks.
c. although zheng he visited many places, he failed to get them to pay tribute.