Brainy how did louis ix of france strengthen royal power? select all that apply.

Louis Ix increased royal power by:
sent roving officials to check on local official, so the local official could obtain the final control
expanded royal courts, in order to make sure that government presence is known and the people are more fearful toward the law
outlawed private wars, to prevent mutiny
ended serfdom in his lands in order to give control to the government for the economy